39779442 has 24 divisors (see below), whose sum is σ = 87604140. Its totient is φ = 13042080.

The previous prime is 39779413. The next prime is 39779449. The reversal of 39779442 is 24497793.

It can be written as a sum of positive squares in 2 ways, for example, as 36614601 + 3164841 = 6051^2 + 1779^2 .

It is not an unprimeable number, because it can be changed into a prime (39779449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17017 + ... + 19212.

Almost surely, 2^39779442 is an apocalyptic number.

39779442 is an abundant number, since it is smaller than the sum of its proper divisors (47824698).

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

39779442 is a wasteful number, since it uses less digits than its factorization.

39779442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36298 (or 36295 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 39779442 is about 6307.0945767445. The cubic root of 39779442 is about 341.3654490028.

The spelling of 39779442 in words is "thirty-nine million, seven hundred seventy-nine thousand, four hundred forty-two".