400902140 has 24 divisors (see below), whose sum is σ = 842274720. Its totient is φ = 160288448.

The previous prime is 400902127. The next prime is 400902179. The reversal of 400902140 is 41209004.

It is a super-4 number, since 4×400902140⁴ (a number of 36 digits) contains 4444 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74666 + ... + 79854.

It is an arithmetic number, because the mean of its divisors is an integer number (35094780).

Almost surely, 2^400902140 is an apocalyptic number.

It is an amenable number.

400902140 is an abundant number, since it is smaller than the sum of its proper divisors (441372580).

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

400902140 is a wasteful number, since it uses less digits than its factorization.

400902140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061 (or 9059 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 400902140 is about 20022.5407978109. The cubic root of 400902140 is about 737.3598025183.

The spelling of 400902140 in words is "four hundred million, nine hundred two thousand, one hundred forty".