39997500 has 60 divisors (see below), whose sum is σ = 116643912. Its totient is φ = 10664000.

The previous prime is 39997499. The next prime is 39997511. The reversal of 39997500 is 579993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4834 + ... + 10166.

Almost surely, 2^39997500 is an apocalyptic number.

39997500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39997500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58321956).

39997500 is an abundant number, since it is smaller than the sum of its proper divisors (76646412).

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

39997500 is a wasteful number, since it uses less digits than its factorization.

39997500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360 (or 5343 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 39997500 is about 6324.3576748947. The cubic root of 39997500 is about 341.9880642871.

The spelling of 39997500 in words is "thirty-nine million, nine hundred ninety-seven thousand, five hundred".