39989500 has 24 divisors (see below), whose sum is σ = 87338160. Its totient is φ = 15995600.

The previous prime is 39989497. The next prime is 39989501. The reversal of 39989500 is 598993.

It is a super-2 number, since 2×39989500² = 3198320220500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39989501) 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, 39490 + ... + 40489.

It is an arithmetic number, because the mean of its divisors is an integer number (3639090).

Almost surely, 2^39989500 is an apocalyptic number.

It is an amenable number.

39989500 is an abundant number, since it is smaller than the sum of its proper divisors (47348660).

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

39989500 is a wasteful number, since it uses less digits than its factorization.

39989500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79998 (or 79986 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 39989500 is about 6323.7251679686. The cubic root of 39989500 is about 341.9652621375.

The spelling of 39989500 in words is "thirty-nine million, nine hundred eighty-nine thousand, five hundred".