39700428 has 12 divisors (see below), whose sum is σ = 92634360. Its totient is φ = 13233472.

The previous prime is 39700411. The next prime is 39700439. The reversal of 39700428 is 82400793.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×39700428² = 3152247966766368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654173 + ... + 1654196.

It is an arithmetic number, because the mean of its divisors is an integer number (7719530).

Almost surely, 2^39700428 is an apocalyptic number.

It is an amenable number.

39700428 is an abundant number, since it is smaller than the sum of its proper divisors (52933932).

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

39700428 is a wasteful number, since it uses less digits than its factorization.

39700428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308376 (or 3308374 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 39700428 is about 6300.8275646934. The cubic root of 39700428 is about 341.1392808569.

Adding to 39700428 its reverse (82400793), we get a palindrome (122101221).

The spelling of 39700428 in words is "thirty-nine million, seven hundred thousand, four hundred twenty-eight".