39945800 has 24 divisors (see below), whose sum is σ = 92874450. Its totient is φ = 15978240.

The previous prime is 39945799. The next prime is 39945821. The reversal of 39945800 is 854993.

It can be written as a sum of positive squares in 3 ways, for example, as 23020804 + 16924996 = 4798^2 + 4114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99665 + ... + 100064.

Almost surely, 2^39945800 is an apocalyptic number.

It is an amenable number.

39945800 is an abundant number, since it is smaller than the sum of its proper divisors (52928650).

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

39945800 is a wasteful number, since it uses less digits than its factorization.

39945800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199745 (or 199736 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 39945800 is about 6320.2689816178. The cubic root of 39945800 is about 341.8406516876.

The spelling of 39945800 in words is "thirty-nine million, nine hundred forty-five thousand, eight hundred".