28669660 has 24 divisors (see below), whose sum is σ = 61676496. Its totient is φ = 11187840.

The previous prime is 28669643. The next prime is 28669681. The reversal of 28669660 is 6696682.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16662 + ... + 18301.

It is an arithmetic number, because the mean of its divisors is an integer number (2569854).

Almost surely, 2^28669660 is an apocalyptic number.

28669660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28669660 is an abundant number, since it is smaller than the sum of its proper divisors (33006836).

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

28669660 is a wasteful number, since it uses less digits than its factorization.

28669660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35013 (or 35011 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 28669660 is about 5354.4056626296. The cubic root of 28669660 is about 306.0606626425.

The spelling of 28669660 in words is "twenty-eight million, six hundred sixty-nine thousand, six hundred sixty".