39940425 has 96 divisors (see below), whose sum is σ = 85708800. Its totient is φ = 17858880.

The previous prime is 39940409. The next prime is 39940469. The reversal of 39940425 is 52404993.

It is not a de Polignac number, because 39940425 - 2⁴ = 39940409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39940425.

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 95 ways as a sum of consecutive naturals, for example, 373222 + ... + 373328.

It is an arithmetic number, because the mean of its divisors is an integer number (892800).

Almost surely, 2^39940425 is an apocalyptic number.

39940425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39940425 is an abundant number, since it is smaller than the sum of its proper divisors (45768375).

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

39940425 is a wasteful number, since it uses less digits than its factorization.

39940425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 39940425 is about 6319.8437480685. The cubic root of 39940425 is about 341.8253186120.

The spelling of 39940425 in words is "thirty-nine million, nine hundred forty thousand, four hundred twenty-five".