401565830 has 16 divisors (see below), whose sum is σ = 724969440. Its totient is φ = 160148352.

The previous prime is 401565803. The next prime is 401565833. The reversal of 401565830 is 38565104.

It is a happy number.

It is a super-2 number, since 2×401565830² = 322510231647177800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401565833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56210 + ... + 62949.

It is an arithmetic number, because the mean of its divisors is an integer number (45310590).

Almost surely, 2^401565830 is an apocalyptic number.

401565830 is a deficient number, since it is larger than the sum of its proper divisors (323403610).

401565830 is a wasteful number, since it uses less digits than its factorization.

401565830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119503.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 401565830 is about 20039.1075150567. The cubic root of 401565830 is about 737.7664757624.

The spelling of 401565830 in words is "four hundred one million, five hundred sixty-five thousand, eight hundred thirty".