400877428 has 36 divisors (see below), whose sum is σ = 859031040. Its totient is φ = 162760752.

The previous prime is 400877413. The next prime is 400877471. The reversal of 400877428 is 824778004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50100 + ... + 57547.

Almost surely, 2^400877428 is an apocalyptic number.

It is an amenable number.

400877428 is an abundant number, since it is smaller than the sum of its proper divisors (458153612).

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

400877428 is a wasteful number, since it uses less digits than its factorization.

400877428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107684 (or 107675 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 400877428 is about 20021.9236838022. The cubic root of 400877428 is about 737.3446516805.

The spelling of 400877428 in words is "four hundred million, eight hundred seventy-seven thousand, four hundred twenty-eight".