401651730 has 32 divisors (see below), whose sum is σ = 1071072000. Its totient is φ = 107107056.

The previous prime is 401651681. The next prime is 401651743. The reversal of 401651730 is 37156104.

401651730 is a `hidden beast` number, since 4 + 0 + 1 + 651 + 7 + 3 + 0 = 666.

It is a super-2 number, since 2×401651730² = 322648224423985800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 401651694 and 401651703.

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, 743530 + ... + 744069.

It is an arithmetic number, because the mean of its divisors is an integer number (33471000).

Almost surely, 2^401651730 is an apocalyptic number.

401651730 is an abundant number, since it is smaller than the sum of its proper divisors (669420270).

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

401651730 is a wasteful number, since it uses less digits than its factorization.

401651730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487615 (or 1487609 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 401651730 is about 20041.2507094742. The cubic root of 401651730 is about 737.8190778658.

The spelling of 401651730 in words is "four hundred one million, six hundred fifty-one thousand, seven hundred thirty".