39988020 has 24 divisors (see below), whose sum is σ = 111966624. Its totient is φ = 10663456.

The previous prime is 39987949. The next prime is 39988031. The reversal of 39988020 is 2088993.

It is a self number, because there is not a number n which added to its sum of digits gives 39988020.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 333174 + ... + 333293.

It is an arithmetic number, because the mean of its divisors is an integer number (4665276).

Almost surely, 2^39988020 is an apocalyptic number.

39988020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39988020 is an abundant number, since it is smaller than the sum of its proper divisors (71978604).

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

39988020 is a wasteful number, since it uses less digits than its factorization.

39988020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666479 (or 666477 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 39988020 is about 6323.6081472526. The cubic root of 39988020 is about 341.9610434065.

The spelling of 39988020 in words is "thirty-nine million, nine hundred eighty-eight thousand, twenty".