400157655 has 16 divisors (see below), whose sum is σ = 640773504. Its totient is φ = 213243680.

The previous prime is 400157557. The next prime is 400157669. The reversal of 400157655 is 556751004.

It is not a de Polignac number, because 400157655 - 2¹⁴ = 400141271 is a prime.

It is a super-2 number, since 2×400157655² = 320252297710198050, which contains 22 as substring.

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, 9400 + ... + 29810.

It is an arithmetic number, because the mean of its divisors is an integer number (40048344).

Almost surely, 2^400157655 is an apocalyptic number.

400157655 is a deficient number, since it is larger than the sum of its proper divisors (240615849).

400157655 is a wasteful number, since it uses less digits than its factorization.

400157655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21726.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 400157655 is about 20003.9409867156. The cubic root of 400157655 is about 736.9030880109.

The spelling of 400157655 in words is "four hundred million, one hundred fifty-seven thousand, six hundred fifty-five".