39987390 has 16 divisors (see below), whose sum is σ = 95969808. Its totient is φ = 10663296.

The previous prime is 39987379. The next prime is 39987403. The reversal of 39987390 is 9378993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666427 + ... + 666486.

It is an arithmetic number, because the mean of its divisors is an integer number (5998113).

Almost surely, 2^39987390 is an apocalyptic number.

39987390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

39987390 is an abundant number, since it is smaller than the sum of its proper divisors (55982418).

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

39987390 is a wasteful number, since it uses less digits than its factorization.

39987390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332923.

The product of its (nonzero) digits is 367416, while the sum is 48.

The square root of 39987390 is about 6323.5583337232. The cubic root of 39987390 is about 341.9592475637.

The spelling of 39987390 in words is "thirty-nine million, nine hundred eighty-seven thousand, three hundred ninety".