39988442 has 24 divisors (see below), whose sum is σ = 65394684. Its totient is φ = 18330624.

The previous prime is 39988433. The next prime is 39988469. The reversal of 39988442 is 24488993.

It can be written as a sum of positive squares in 6 ways, for example, as 436921 + 39551521 = 661^2 + 6289^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64928 + ... + 65540.

Almost surely, 2^39988442 is an apocalyptic number.

39988442 is a deficient number, since it is larger than the sum of its proper divisors (25406242).

39988442 is a wasteful number, since it uses less digits than its factorization.

39988442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 821 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 39988442 is about 6323.6415141910. The cubic root of 39988442 is about 341.9622463255.

The spelling of 39988442 in words is "thirty-nine million, nine hundred eighty-eight thousand, four hundred forty-two".