1400240142 has 64 divisors (see below), whose sum is σ = 3562329600. Its totient is φ = 399375360.

The previous prime is 1400240119. The next prime is 1400240143. The reversal of 1400240142 is 2410420041.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400240143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239409 + ... + 245187.

It is an arithmetic number, because the mean of its divisors is an integer number (55661400).

Almost surely, 2^1400240142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400240142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781164800).

1400240142 is an abundant number, since it is smaller than the sum of its proper divisors (2162089458).

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

1400240142 is a wasteful number, since it uses less digits than its factorization.

1400240142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6438 (or 6432 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1400240142 is about 37419.7827625976. The cubic root of 1400240142 is about 1118.7529013293.

Adding to 1400240142 its reverse (2410420041), we get a palindrome (3810660183).

The spelling of 1400240142 in words is "one billion, four hundred million, two hundred forty thousand, one hundred forty-two".