39978272 has 12 divisors (see below), whose sum is σ = 78707286. Its totient is φ = 19989120.

The previous prime is 39978233. The next prime is 39978283. The reversal of 39978272 is 27287993.

It can be written as a sum of positive squares in only one way, i.e., 37405456 + 2572816 = 6116^2 + 1604^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624629 + ... + 624692.

Almost surely, 2^39978272 is an apocalyptic number.

39978272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39978272 is a deficient number, since it is larger than the sum of its proper divisors (38729014).

39978272 is a wasteful number, since it uses less digits than its factorization.

39978272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249331 (or 1249323 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 39978272 is about 6322.8373377780. The cubic root of 39978272 is about 341.9332541906.

The spelling of 39978272 in words is "thirty-nine million, nine hundred seventy-eight thousand, two hundred seventy-two".