39728880 has 100 divisors (see below), whose sum is σ = 138006792. Its totient is φ = 10592640.

The previous prime is 39728839. The next prime is 39728891. The reversal of 39728880 is 8882793.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 3415 + ... + 9545.

Almost surely, 2^39728880 is an apocalyptic number.

39728880 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 39728880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69003396).

39728880 is an abundant number, since it is smaller than the sum of its proper divisors (98277912).

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

39728880 is a wasteful number, since it uses less digits than its factorization.

39728880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156 (or 6141 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 39728880 is about 6303.0849589705. The cubic root of 39728880 is about 341.2207558564.

The spelling of 39728880 in words is "thirty-nine million, seven hundred twenty-eight thousand, eight hundred eighty".