28669998 has 32 divisors (see below), whose sum is σ = 66873600. Its totient is φ = 8190840.

The previous prime is 28669967. The next prime is 28670003. The reversal of 28669998 is 89996682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4908 + ... + 9023.

It is an arithmetic number, because the mean of its divisors is an integer number (2089800).

Almost surely, 2^28669998 is an apocalyptic number.

28669998 is an abundant number, since it is smaller than the sum of its proper divisors (38203602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28669998 is a wasteful number, since it uses less digits than its factorization.

28669998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957 (or 13943 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 57.

The square root of 28669998 is about 5354.4372253300. The cubic root of 28669998 is about 306.0618654018.

The spelling of 28669998 in words is "twenty-eight million, six hundred sixty-nine thousand, nine hundred ninety-eight".