39928500 has 144 divisors (see below), whose sum is σ = 132874560. Its totient is φ = 10065600.

The previous prime is 39928489. The next prime is 39928507. The reversal of 39928500 is 582993.

It is a super-2 number, since 2×39928500² = 3188570224500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39928507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85267 + ... + 85733.

It is an arithmetic number, because the mean of its divisors is an integer number (922740).

Almost surely, 2^39928500 is an apocalyptic number.

39928500 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 39928500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66437280).

39928500 is an abundant number, since it is smaller than the sum of its proper divisors (92946060).

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

39928500 is a wasteful number, since it uses less digits than its factorization.

39928500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 39928500 is about 6318.9002207663. The cubic root of 39928500 is about 341.7912956667.

The spelling of 39928500 in words is "thirty-nine million, nine hundred twenty-eight thousand, five hundred".