400152540 has 48 divisors (see below), whose sum is σ = 1179400320. Its totient is φ = 101090880.

The previous prime is 400152503. The next prime is 400152563. The reversal of 400152540 is 45251004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174366 + ... + 176645.

It is an arithmetic number, because the mean of its divisors is an integer number (24570840).

Almost surely, 2^400152540 is an apocalyptic number.

It is an amenable number.

400152540 is an abundant number, since it is smaller than the sum of its proper divisors (779247780).

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

400152540 is a wasteful number, since it uses less digits than its factorization.

400152540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351042 (or 351040 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 400152540 is about 20003.8131364998. The cubic root of 400152540 is about 736.8999481856.

The spelling of 400152540 in words is "four hundred million, one hundred fifty-two thousand, five hundred forty".