39989000 has 32 divisors (see below), whose sum is σ = 93576600. Its totient is φ = 15995200.

The previous prime is 39988951. The next prime is 39989009. The reversal of 39989000 is 98993.

It can be written as a sum of positive squares in 4 ways, for example, as 5579044 + 34409956 = 2362^2 + 5866^2 .

It is not an unprimeable number, because it can be changed into a prime (39989009) 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, 18995 + ... + 20994.

Almost surely, 2^39989000 is an apocalyptic number.

It is an amenable number.

39989000 is an abundant number, since it is smaller than the sum of its proper divisors (53587600).

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

39989000 is a wasteful number, since it uses less digits than its factorization.

39989000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40010 (or 39996 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 39989000 is about 6323.6856341852. The cubic root of 39989000 is about 341.9638369022.

The spelling of 39989000 in words is "thirty-nine million, nine hundred eighty-nine thousand".