39898840 has 32 divisors (see below), whose sum is σ = 91864080. Its totient is φ = 15587712.

The previous prime is 39898823. The next prime is 39898843. The reversal of 39898840 is 4889893.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39898843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9879 + ... + 13318.

Almost surely, 2^39898840 is an apocalyptic number.

It is an amenable number.

39898840 is an abundant number, since it is smaller than the sum of its proper divisors (51965240).

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

39898840 is a wasteful number, since it uses less digits than its factorization.

39898840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23251 (or 23247 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 39898840 is about 6316.5528573740. The cubic root of 39898840 is about 341.7066440101.

The spelling of 39898840 in words is "thirty-nine million, eight hundred ninety-eight thousand, eight hundred forty".