39887040 has 56 divisors (see below), whose sum is σ = 126644400. Its totient is φ = 10636288.

The previous prime is 39887039. The next prime is 39887047. The reversal of 39887040 is 4078893.

It is a self number, because there is not a number n which added to its sum of digits gives 39887040.

It is not an unprimeable number, because it can be changed into a prime (39887047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19815 + ... + 21734.

Almost surely, 2^39887040 is an apocalyptic number.

39887040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39887040 is an abundant number, since it is smaller than the sum of its proper divisors (86757360).

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

39887040 is a wasteful number, since it uses less digits than its factorization.

39887040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41569 (or 41559 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 39887040 is about 6315.6187345342. The cubic root of 39887040 is about 341.6729543426.

The spelling of 39887040 in words is "thirty-nine million, eight hundred eighty-seven thousand, forty".