39957390 has 48 divisors (see below), whose sum is σ = 113336496. Its totient is φ = 9686400.

The previous prime is 39957377. The next prime is 39957413. The reversal of 39957390 is 9375993.

39957390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×39957390² = 3193186031224200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19191 + ... + 21170.

It is an arithmetic number, because the mean of its divisors is an integer number (2361177).

Almost surely, 2^39957390 is an apocalyptic number.

39957390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39957390 is an abundant number, since it is smaller than the sum of its proper divisors (73379106).

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

39957390 is a wasteful number, since it uses less digits than its factorization.

39957390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40385 (or 40382 counting only the distinct ones).

The product of its (nonzero) digits is 229635, while the sum is 45.

The square root of 39957390 is about 6321.1858064765. The cubic root of 39957390 is about 341.8737093978.

The spelling of 39957390 in words is "thirty-nine million, nine hundred fifty-seven thousand, three hundred ninety".