401240256 has 56 divisors (see below), whose sum is σ = 1124071920. Its totient is φ = 125878272.

The previous prime is 401240251. The next prime is 401240303. The reversal of 401240256 is 652042104.

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

It is not an unprimeable number, because it can be changed into a prime (401240251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58201 + ... + 64728.

Almost surely, 2^401240256 is an apocalyptic number.

It is an amenable number.

401240256 is an abundant number, since it is smaller than the sum of its proper divisors (722831664).

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

401240256 is a wasteful number, since it uses less digits than its factorization.

401240256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122961 (or 122951 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 401240256 is about 20030.9824022687. The cubic root of 401240256 is about 737.5670377059.

The spelling of 401240256 in words is "four hundred one million, two hundred forty thousand, two hundred fifty-six".