2515988 has 6 divisors (see below), whose sum is σ = 4402986. Its totient is φ = 1257992.

The previous prime is 2515967. The next prime is 2516021. The reversal of 2515988 is 8895152.

It can be written as a sum of positive squares in only one way, i.e., 2365444 + 150544 = 1538^2 + 388^2 .

It is a super-2 number, since 2×2515988² = 12660391232288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314495 + ... + 314502.

It is an arithmetic number, because the mean of its divisors is an integer number (733831).

2^2515988 is an apocalyptic number.

It is an amenable number.

2515988 is a deficient number, since it is larger than the sum of its proper divisors (1886998).

2515988 is a wasteful number, since it uses less digits than its factorization.

2515988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629001 (or 628999 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 2515988 is about 1586.1866220593. The cubic root of 2515988 is about 136.0095869828.

The spelling of 2515988 in words is "two million, five hundred fifteen thousand, nine hundred eighty-eight".