401655868 has 24 divisors (see below), whose sum is σ = 723081632. Its totient is φ = 195079104.

The previous prime is 401655857. The next prime is 401655869. The reversal of 401655868 is 868556104.

It is a super-2 number, since 2×401655868² = 322654872597666848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401655869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105730 + ... + 109462.

Almost surely, 2^401655868 is an apocalyptic number.

It is an amenable number.

401655868 is a deficient number, since it is larger than the sum of its proper divisors (321425764).

401655868 is a wasteful number, since it uses less digits than its factorization.

401655868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 4499 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 401655868 is about 20041.3539462782. The cubic root of 401655868 is about 737.8216116404.

The spelling of 401655868 in words is "four hundred one million, six hundred fifty-five thousand, eight hundred sixty-eight".