401791680 has 84 divisors (see below), whose sum is σ = 1382005872. Its totient is φ = 107143680.

The previous prime is 401791679. The next prime is 401791729. The reversal of 401791680 is 86197104.

It is a super-2 number, since 2×401791680² = 322873108234444800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66876 + ... + 72635.

Almost surely, 2^401791680 is an apocalyptic number.

401791680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401791680 is an abundant number, since it is smaller than the sum of its proper divisors (980214192).

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

401791680 is a wasteful number, since it uses less digits than its factorization.

401791680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139534 (or 139521 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 401791680 is about 20044.7419539389. The cubic root of 401791680 is about 737.9047622051.

The spelling of 401791680 in words is "four hundred one million, seven hundred ninety-one thousand, six hundred eighty".