39439872 has 120 divisors (see below), whose sum is σ = 118414296. Its totient is φ = 13105152.

The previous prime is 39439867. The next prime is 39439919. The reversal of 39439872 is 27893493.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124258 + ... + 124574.

Almost surely, 2^39439872 is an apocalyptic number.

39439872 is a gapful number since it is divisible by the number (32) 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 39439872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59207148).

39439872 is an abundant number, since it is smaller than the sum of its proper divisors (78974424).

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

39439872 is an frugal number, since it uses more digits than its factorization.

39439872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 322 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 39439872 is about 6280.1171963587. The cubic root of 39439872 is about 340.3913371753.

The spelling of 39439872 in words is "thirty-nine million, four hundred thirty-nine thousand, eight hundred seventy-two".