39898720 has 24 divisors (see below), whose sum is σ = 94261104. Its totient is φ = 15959424.

The previous prime is 39898679. The next prime is 39898739. The reversal of 39898720 is 2789893.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 124524 + ... + 124843.

It is an arithmetic number, because the mean of its divisors is an integer number (3927546).

Almost surely, 2^39898720 is an apocalyptic number.

It is an amenable number.

39898720 is an abundant number, since it is smaller than the sum of its proper divisors (54362384).

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

39898720 is a wasteful number, since it uses less digits than its factorization.

39898720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249382 (or 249374 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 39898720 is about 6316.5433585150. The cubic root of 39898720 is about 341.7063014368.

The spelling of 39898720 in words is "thirty-nine million, eight hundred ninety-eight thousand, seven hundred twenty".