39887425 has 12 divisors (see below), whose sum is σ = 49953276. Its totient is φ = 31592000.

The previous prime is 39887401. The next prime is 39887437. The reversal of 39887425 is 52478893.

It can be written as a sum of positive squares in 6 ways, for example, as 2835856 + 37051569 = 1684^2 + 6087^2 .

It is a de Polignac number, because none of the positive numbers 2^k-39887425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5374 + ... + 10423.

It is an arithmetic number, because the mean of its divisors is an integer number (4162773).

Almost surely, 2^39887425 is an apocalyptic number.

It is an amenable number.

39887425 is a deficient number, since it is larger than the sum of its proper divisors (10065851).

39887425 is a wasteful number, since it uses less digits than its factorization.

39887425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15908 (or 15903 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 39887425 is about 6315.6492144514. The cubic root of 39887425 is about 341.6740536442.

The spelling of 39887425 in words is "thirty-nine million, eight hundred eighty-seven thousand, four hundred twenty-five".