39728844 has 18 divisors (see below), whose sum is σ = 100425780. Its totient is φ = 13242936.

The previous prime is 39728839. The next prime is 39728891. The reversal of 39728844 is 44882793.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 39728844.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 551754 + ... + 551825.

It is an arithmetic number, because the mean of its divisors is an integer number (5579210).

Almost surely, 2^39728844 is an apocalyptic number.

It is an amenable number.

39728844 is an abundant number, since it is smaller than the sum of its proper divisors (60696936).

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

39728844 is a wasteful number, since it uses less digits than its factorization.

39728844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103589 (or 1103584 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 39728844 is about 6303.0821032254. The cubic root of 39728844 is about 341.2206527916.

It can be divided in two parts, 397 and 28844, that added together give a square (29241 = 171²).

The spelling of 39728844 in words is "thirty-nine million, seven hundred twenty-eight thousand, eight hundred forty-four".