28928930 has 8 divisors (see below), whose sum is σ = 52072092. Its totient is φ = 11571568.

The previous prime is 28928897. The next prime is 28928941. The reversal of 28928930 is 3982982.

It can be written as a sum of positive squares in 2 ways, for example, as 26327161 + 2601769 = 5131^2 + 1613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446437 + ... + 1446456.

Almost surely, 2^28928930 is an apocalyptic number.

28928930 is a deficient number, since it is larger than the sum of its proper divisors (23143162).

28928930 is a wasteful number, since it uses less digits than its factorization.

28928930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892900.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 28928930 is about 5378.5620754994. The cubic root of 28928930 is about 306.9805007651.

The spelling of 28928930 in words is "twenty-eight million, nine hundred twenty-eight thousand, nine hundred thirty".