39897960 has 64 divisors (see below), whose sum is σ = 120113280. Its totient is φ = 10602240.

The previous prime is 39897959. The next prime is 39897989. The reversal of 39897960 is 6979893.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60030 + ... + 60690.

It is an arithmetic number, because the mean of its divisors is an integer number (1876770).

Almost surely, 2^39897960 is an apocalyptic number.

39897960 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39897960 is an abundant number, since it is smaller than the sum of its proper divisors (80215320).

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

39897960 is a wasteful number, since it uses less digits than its factorization.

39897960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 39897960 is about 6316.4831987428. The cubic root of 39897960 is about 341.7041317896.

The spelling of 39897960 in words is "thirty-nine million, eight hundred ninety-seven thousand, nine hundred sixty".