39988125 has 30 divisors (see below), whose sum is σ = 72187830. Its totient is φ = 21324000.

The previous prime is 39988111. The next prime is 39988127. The reversal of 39988125 is 52188993.

It is a happy number.

39988125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 23561316 + 16426809 = 4854^2 + 4053^2 .

It is not a de Polignac number, because 39988125 - 2¹² = 39984029 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39988127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2071 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (2406261).

Almost surely, 2^39988125 is an apocalyptic number.

It is an amenable number.

39988125 is a deficient number, since it is larger than the sum of its proper divisors (32199705).

39988125 is an equidigital number, since it uses as much as digits as its factorization.

39988125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7135 (or 7117 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 39988125 is about 6323.6164494694. The cubic root of 39988125 is about 341.9613427118.

The spelling of 39988125 in words is "thirty-nine million, nine hundred eighty-eight thousand, one hundred twenty-five".