28458828 has 18 divisors (see below), whose sum is σ = 71937684. Its totient is φ = 9486264.

The previous prime is 28458821. The next prime is 28458839. The reversal of 28458828 is 82885482.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×28458828² = 1619809782267168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28458821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395226 + ... + 395297.

It is an arithmetic number, because the mean of its divisors is an integer number (3996538).

Almost surely, 2^28458828 is an apocalyptic number.

It is an amenable number.

28458828 is an abundant number, since it is smaller than the sum of its proper divisors (43478856).

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

28458828 is a wasteful number, since it uses less digits than its factorization.

28458828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790533 (or 790528 counting only the distinct ones).

The product of its digits is 327680, while the sum is 45.

The square root of 28458828 is about 5334.6816212404. The cubic root of 28458828 is about 305.3085759925.

The spelling of 28458828 in words is "twenty-eight million, four hundred fifty-eight thousand, eight hundred twenty-eight".