1402323840 has 384 divisors, whose sum is σ = 5132574720. Its totient is φ = 365783040.

The previous prime is 1402323833. The next prime is 1402323847. The reversal of 1402323840 is 483232041.

It is an interprime number because it is at equal distance from previous prime (1402323833) and next prime (1402323847).

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402323847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11041857 + ... + 11041983.

It is an arithmetic number, because the mean of its divisors is an integer number (13366080).

Almost surely, 2^1402323840 is an apocalyptic number.

1402323840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2566287360).

1402323840 is an abundant number, since it is smaller than the sum of its proper divisors (3730250880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1402323840 is an equidigital number, since it uses as much as digits as its factorization.

1402323840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1402323840 is about 37447.6146102793. The cubic root of 1402323840 is about 1119.3075651909.

Adding to 1402323840 its reverse (483232041), we get a palindrome (1885555881).

The spelling of 1402323840 in words is "one billion, four hundred two million, three hundred twenty-three thousand, eight hundred forty".