28661912 has 8 divisors (see below), whose sum is σ = 53741100. Its totient is φ = 14330952.

The previous prime is 28661903. The next prime is 28661953. The reversal of 28661912 is 21916682.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1791362 + ... + 1791377.

Almost surely, 2^28661912 is an apocalyptic number.

It is an amenable number.

28661912 is a deficient number, since it is larger than the sum of its proper divisors (25079188).

28661912 is a wasteful number, since it uses less digits than its factorization.

28661912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582745 (or 3582741 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 28661912 is about 5353.6820973980. The cubic root of 28661912 is about 306.0330891070.

The spelling of 28661912 in words is "twenty-eight million, six hundred sixty-one thousand, nine hundred twelve".