39900420 has 72 divisors (see below), whose sum is σ = 138325824. Its totient is φ = 9119808.

The previous prime is 39900409. The next prime is 39900439. The reversal of 39900420 is 2400993.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14574 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (1921192).

Almost surely, 2^39900420 is an apocalyptic number.

39900420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39900420 is an abundant number, since it is smaller than the sum of its proper divisors (98425404).

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

39900420 is a wasteful number, since it uses less digits than its factorization.

39900420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31689 (or 31684 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 39900420 is about 6316.6779243523. The cubic root of 39900420 is about 341.7111544953.

The spelling of 39900420 in words is "thirty-nine million, nine hundred thousand, four hundred twenty".