39687930 has 48 divisors (see below), whose sum is σ = 103825800. Its totient is φ = 10518144.

The previous prime is 39687929. The next prime is 39687953. The reversal of 39687930 is 3978693.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39652209 + 35721 = 6297^2 + 189^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14296 + ... + 16844.

Almost surely, 2^39687930 is an apocalyptic number.

39687930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39687930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51912900).

39687930 is an abundant number, since it is smaller than the sum of its proper divisors (64137870).

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

39687930 is a wasteful number, since it uses less digits than its factorization.

39687930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39687930 is about 6299.8357121436. The cubic root of 39687930 is about 341.1034793435.

The spelling of 39687930 in words is "thirty-nine million, six hundred eighty-seven thousand, nine hundred thirty".