401391552 has 56 divisors (see below), whose sum is σ = 1098651600. Its totient is φ = 129181696.

The previous prime is 401391527. The next prime is 401391553. The reversal of 401391552 is 255193104.

It is a super-2 number, since 2×401391552² = 322230356033937408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401391553) 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, 30477 + ... + 41612.

Almost surely, 2^401391552 is an apocalyptic number.

It is an amenable number.

401391552 is an abundant number, since it is smaller than the sum of its proper divisors (697260048).

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

401391552 is a wasteful number, since it uses less digits than its factorization.

401391552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72133 (or 72123 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 401391552 is about 20034.7585960001. The cubic root of 401391552 is about 737.6597310634.

The spelling of 401391552 in words is "four hundred one million, three hundred ninety-one thousand, five hundred fifty-two".