1400865156 has 36 divisors (see below), whose sum is σ = 3563644812. Its totient is φ = 463978944.

The previous prime is 1400865149. The next prime is 1400865157. The reversal of 1400865156 is 6515680041.

It can be written as a sum of positive squares in 2 ways, for example, as 297562500 + 1103302656 = 17250^2 + 33216^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1400865156.

It is not an unprimeable number, because it can be changed into a prime (1400865157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118275 + ... + 129578.

Almost surely, 2^1400865156 is an apocalyptic number.

It is an amenable number.

1400865156 is an abundant number, since it is smaller than the sum of its proper divisors (2162779656).

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

1400865156 is a wasteful number, since it uses less digits than its factorization.

1400865156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248020 (or 248015 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 1400865156 is about 37428.1332155372. The cubic root of 1400865156 is about 1118.9193328323.

The spelling of 1400865156 in words is "one billion, four hundred million, eight hundred sixty-five thousand, one hundred fifty-six".