401215136 has 36 divisors (see below), whose sum is σ = 918857898. Its totient is φ = 171948672.

The previous prime is 401215123. The next prime is 401215159. The reversal of 401215136 is 631512104.

It can be written as a sum of positive squares in only one way, i.e., 400800400 + 414736 = 20020^2 + 644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126371 + ... + 129506.

Almost surely, 2^401215136 is an apocalyptic number.

It is an amenable number.

401215136 is an abundant number, since it is smaller than the sum of its proper divisors (517642762).

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

401215136 is a wasteful number, since it uses less digits than its factorization.

401215136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255901 (or 255886 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 401215136 is about 20030.3553637972. The cubic root of 401215136 is about 737.5516453731.

The spelling of 401215136 in words is "four hundred one million, two hundred fifteen thousand, one hundred thirty-six".