401330256 has 20 divisors (see below), whose sum is σ = 1036769952. Its totient is φ = 133776736.

The previous prime is 401330239. The next prime is 401330273. The reversal of 401330256 is 652033104.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (401330239) and next prime (401330273).

It is a super-2 number, since 2×401330256² = 322131948762051072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4180476 + ... + 4180571.

Almost surely, 2^401330256 is an apocalyptic number.

It is an amenable number.

401330256 is an abundant number, since it is smaller than the sum of its proper divisors (635439696).

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

401330256 is a wasteful number, since it uses less digits than its factorization.

401330256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8361058 (or 8361052 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 401330256 is about 20033.2287961776. The cubic root of 401330256 is about 737.6221801214.

The spelling of 401330256 in words is "four hundred one million, three hundred thirty thousand, two hundred fifty-six".