28869628 has 6 divisors (see below), whose sum is σ = 50521856. Its totient is φ = 14434812.

The previous prime is 28869619. The next prime is 28869647. The reversal of 28869628 is 82696882.

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, 3608700 + ... + 3608707.

Almost surely, 2^28869628 is an apocalyptic number.

It is an amenable number.

28869628 is a deficient number, since it is larger than the sum of its proper divisors (21652228).

28869628 is a wasteful number, since it uses less digits than its factorization.

28869628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217411 (or 7217409 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 28869628 is about 5373.0464356825. The cubic root of 28869628 is about 306.7705954196.

The spelling of 28869628 in words is "twenty-eight million, eight hundred sixty-nine thousand, six hundred twenty-eight".