39780628 has 6 divisors (see below), whose sum is σ = 69616106. Its totient is φ = 19890312.

The previous prime is 39780617. The next prime is 39780641. The reversal of 39780628 is 82608793.

It can be written as a sum of positive squares in only one way, i.e., 39287824 + 492804 = 6268^2 + 702^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4972575 + ... + 4972582.

Almost surely, 2^39780628 is an apocalyptic number.

It is an amenable number.

39780628 is a deficient number, since it is larger than the sum of its proper divisors (29835478).

39780628 is a wasteful number, since it uses less digits than its factorization.

39780628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9945161 (or 9945159 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 39780628 is about 6307.1885971485. The cubic root of 39780628 is about 341.3688415039.

The spelling of 39780628 in words is "thirty-nine million, seven hundred eighty thousand, six hundred twenty-eight".