28915604 has 12 divisors (see below), whose sum is σ = 50653428. Its totient is φ = 14443200.

The previous prime is 28915597. The next prime is 28915633. The reversal of 28915604 is 40651982.

It can be written as a sum of positive squares in 2 ways, for example, as 15225604 + 13690000 = 3902^2 + 3700^2 .

It is a super-2 number, since 2×28915604² = 1672224309369632, 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 in 3 ways as a sum of consecutive naturals, for example, 1664 + ... + 7784.

It is an arithmetic number, because the mean of its divisors is an integer number (4221119).

Almost surely, 2^28915604 is an apocalyptic number.

It is an amenable number.

28915604 is a deficient number, since it is larger than the sum of its proper divisors (21737824).

28915604 is a wasteful number, since it uses less digits than its factorization.

28915604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7306 (or 7304 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28915604 is about 5377.3231258685. The cubic root of 28915604 is about 306.9333570644.

The spelling of 28915604 in words is "twenty-eight million, nine hundred fifteen thousand, six hundred four".