1402302440 has 128 divisors (see below), whose sum is σ = 3970771200. Its totient is φ = 432967680.

The previous prime is 1402302431. The next prime is 1402302449. The reversal of 1402302440 is 442032041.

It is an interprime number because it is at equal distance from previous prime (1402302431) and next prime (1402302449).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1402302449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333632 + ... + 337808.

It is an arithmetic number, because the mean of its divisors is an integer number (31021650).

Almost surely, 2^1402302440 is an apocalyptic number.

1402302440 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 1402302440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985385600).

1402302440 is an abundant number, since it is smaller than the sum of its proper divisors (2568468760).

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

1402302440 is a wasteful number, since it uses less digits than its factorization.

1402302440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315 (or 4311 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1402302440 is about 37447.3288767036. The cubic root of 1402302440 is about 1119.3018714743.

Adding to 1402302440 its reverse (442032041), we get a palindrome (1844334481).

The spelling of 1402302440 in words is "one billion, four hundred two million, three hundred two thousand, four hundred forty".