39790305 has 32 divisors (see below), whose sum is σ = 71089920. Its totient is φ = 21116160.

The previous prime is 39790297. The next prime is 39790307. The reversal of 39790305 is 50309793.

It is not a de Polignac number, because 39790305 - 2³ = 39790297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39790305.

It is not an unprimeable number, because it can be changed into a prime (39790307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31924 + ... + 33146.

It is an arithmetic number, because the mean of its divisors is an integer number (2221560).

Almost surely, 2^39790305 is an apocalyptic number.

It is an amenable number.

39790305 is a deficient number, since it is larger than the sum of its proper divisors (31299615).

39790305 is a wasteful number, since it uses less digits than its factorization.

39790305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 39790305 is about 6307.9556910302. The cubic root of 39790305 is about 341.3965196195.

The spelling of 39790305 in words is "thirty-nine million, seven hundred ninety thousand, three hundred five".