28866630 has 32 divisors (see below), whose sum is σ = 74610144. Its totient is φ = 7105536.

The previous prime is 28866599. The next prime is 28866637. The reversal of 28866630 is 3666882.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28866637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36619 + ... + 37398.

It is an arithmetic number, because the mean of its divisors is an integer number (2331567).

Almost surely, 2^28866630 is an apocalyptic number.

28866630 is an abundant number, since it is smaller than the sum of its proper divisors (45743514).

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

28866630 is a wasteful number, since it uses less digits than its factorization.

28866630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74040.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28866630 is about 5372.7674433201. The cubic root of 28866630 is about 306.7599760692.

The spelling of 28866630 in words is "twenty-eight million, eight hundred sixty-six thousand, six hundred thirty".