39422640640 has 40 divisors (see below), whose sum is σ = 94521946860. Its totient is φ = 15769055232.

The previous prime is 39422640623. The next prime is 39422640659. The reversal of 39422640640 is 4604622493.

It can be written as a sum of positive squares in 2 ways, for example, as 34822545664 + 4600094976 = 186608^2 + 67824^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 39422640593 and 39422640602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7697175 + ... + 7702294.

Almost surely, 2^39422640640 is an apocalyptic number.

It is an amenable number.

39422640640 is an abundant number, since it is smaller than the sum of its proper divisors (55099306220).

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

39422640640 is an equidigital number, since it uses as much as digits as its factorization.

39422640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15399492 (or 15399476 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 39422640640 in words is "thirty-nine billion, four hundred twenty-two million, six hundred forty thousand, six hundred forty".