401481756 has 36 divisors (see below), whose sum is σ = 1092923832. Its totient is φ = 123532704.

The previous prime is 401481719. The next prime is 401481757. The reversal of 401481756 is 657184104.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×401481756² = 322375200801687072, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 401481756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401481757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 428466 + ... + 429401.

Almost surely, 2^401481756 is an apocalyptic number.

It is an amenable number.

401481756 is an abundant number, since it is smaller than the sum of its proper divisors (691442076).

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

401481756 is a wasteful number, since it uses less digits than its factorization.

401481756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857890 (or 857885 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 401481756 is about 20037.0096571320. The cubic root of 401481756 is about 737.7149845719.

The spelling of 401481756 in words is "four hundred one million, four hundred eighty-one thousand, seven hundred fifty-six".