396181872 has 60 divisors (see below), whose sum is σ = 1173987360. Its totient is φ = 124291584.

The previous prime is 396181867. The next prime is 396181897. The reversal of 396181872 is 278181693.

396181872 is a `hidden beast` number, since 396 + 181 + 87 + 2 = 666.

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, 78472 + ... + 83367.

It is an arithmetic number, because the mean of its divisors is an integer number (19566456).

Almost surely, 2^396181872 is an apocalyptic number.

It is an amenable number.

396181872 is an abundant number, since it is smaller than the sum of its proper divisors (777805488).

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

396181872 is a wasteful number, since it uses less digits than its factorization.

396181872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161870 (or 161861 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 396181872 is about 19904.3179235059. The cubic root of 396181872 is about 734.4544500902.

The spelling of 396181872 in words is "three hundred ninety-six million, one hundred eighty-one thousand, eight hundred seventy-two".