39648987 has 48 divisors (see below), whose sum is σ = 71354880. Its totient is φ = 21654864.

The previous prime is 39648977. The next prime is 39648989. The reversal of 39648987 is 78984693.

It is not a de Polignac number, because 39648987 - 2⁴ = 39648971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39648989) 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, 29778 + ... + 31080.

It is an arithmetic number, because the mean of its divisors is an integer number (1486560).

Almost surely, 2^39648987 is an apocalyptic number.

39648987 is a deficient number, since it is larger than the sum of its proper divisors (31705893).

39648987 is a wasteful number, since it uses less digits than its factorization.

39648987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349 (or 1336 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 39648987 is about 6296.7441586903. The cubic root of 39648987 is about 340.9918758080.

The spelling of 39648987 in words is "thirty-nine million, six hundred forty-eight thousand, nine hundred eighty-seven".