39920888544 has 48 divisors (see below), whose sum is σ = 105872690448. Its totient is φ = 13169774592.

The previous prime is 39920888533. The next prime is 39920888549. The reversal of 39920888544 is 44588802993.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920888549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134207 + ... + 2152830.

It is an arithmetic number, because the mean of its divisors is an integer number (2205681051).

Almost surely, 2^39920888544 is an apocalyptic number.

It is an amenable number.

39920888544 is an abundant number, since it is smaller than the sum of its proper divisors (65951801904).

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

39920888544 is a wasteful number, since it uses less digits than its factorization.

39920888544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287147 (or 4287139 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 39920888544 in words is "thirty-nine billion, nine hundred twenty million, eight hundred eighty-eight thousand, five hundred forty-four".