39957090 has 32 divisors (see below), whose sum is σ = 96102720. Its totient is φ = 10632384.

The previous prime is 39957031. The next prime is 39957091. The reversal of 39957090 is 9075993.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39957091) by changing a digit.

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, 16476 + ... + 18744.

It is an arithmetic number, because the mean of its divisors is an integer number (3003210).

Almost surely, 2^39957090 is an apocalyptic number.

39957090 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39957090 is an abundant number, since it is smaller than the sum of its proper divisors (56145630).

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

39957090 is a wasteful number, since it uses less digits than its factorization.

39957090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 39957090 is about 6321.1620767071. The cubic root of 39957090 is about 341.8728538000.

The spelling of 39957090 in words is "thirty-nine million, nine hundred fifty-seven thousand, ninety".