39450978 has 36 divisors (see below), whose sum is σ = 99434790. Its totient is φ = 11271456.

The previous prime is 39450959. The next prime is 39450989. The reversal of 39450978 is 87905493.

It can be written as a sum of positive squares in only one way, i.e., 29127609 + 10323369 = 5397^2 + 3213^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21483 + ... + 23246.

Almost surely, 2^39450978 is an apocalyptic number.

39450978 is an abundant number, since it is smaller than the sum of its proper divisors (59983812).

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

39450978 is a wasteful number, since it uses less digits than its factorization.

39450978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44751 (or 44741 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 39450978 is about 6281.0013532875. The cubic root of 39450978 is about 340.4232848060.

The spelling of 39450978 in words is "thirty-nine million, four hundred fifty thousand, nine hundred seventy-eight".