401851020 has 48 divisors (see below), whose sum is σ = 1137840480. Its totient is φ = 105954816.

The previous prime is 401850979. The next prime is 401851031. The reversal of 401851020 is 20158104.

It is a super-2 number, since 2×401851020² = 322968484550080800, which contains 22 as substring.

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, 32287 + ... + 42966.

It is an arithmetic number, because the mean of its divisors is an integer number (23705010).

Almost surely, 2^401851020 is an apocalyptic number.

It is an amenable number.

401851020 is an abundant number, since it is smaller than the sum of its proper divisors (735989460).

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

401851020 is a wasteful number, since it uses less digits than its factorization.

401851020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75354 (or 75352 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 401851020 is about 20046.2220879646. Note that the first 3 decimals coincide. The cubic root of 401851020 is about 737.9410870930.

The spelling of 401851020 in words is "four hundred one million, eight hundred fifty-one thousand, twenty".