396881550 has 72 divisors (see below), whose sum is σ = 1148327544. Its totient is φ = 97692480.

The previous prime is 396881539. The next prime is 396881567. The reversal of 396881550 is 55188693.

396881550 is a `hidden beast` number, since 3 + 96 + 8 + 8 + 1 + 550 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 396881496 and 396881505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28072 + ... + 39771.

Almost surely, 2^396881550 is an apocalyptic number.

396881550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

396881550 is an abundant number, since it is smaller than the sum of its proper divisors (751445994).

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

396881550 is a wasteful number, since it uses less digits than its factorization.

396881550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67874 (or 67866 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The square root of 396881550 is about 19921.8862058792. The cubic root of 396881550 is about 734.8865575300.

The spelling of 396881550 in words is "three hundred ninety-six million, eight hundred eighty-one thousand, five hundred fifty".