28417028 has 6 divisors (see below), whose sum is σ = 49729806. Its totient is φ = 14208512.

The previous prime is 28417019. The next prime is 28417031. The reversal of 28417028 is 82071482.

It can be written as a sum of positive squares in only one way, i.e., 15225604 + 13191424 = 3902^2 + 3632^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28416985 and 28417003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3552125 + ... + 3552132.

It is an arithmetic number, because the mean of its divisors is an integer number (8288301).

Almost surely, 2^28417028 is an apocalyptic number.

It is an amenable number.

28417028 is a deficient number, since it is larger than the sum of its proper divisors (21312778).

28417028 is a wasteful number, since it uses less digits than its factorization.

28417028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104261 (or 7104259 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28417028 is about 5330.7624220181. The cubic root of 28417028 is about 305.1590248379.

The spelling of 28417028 in words is "twenty-eight million, four hundred seventeen thousand, twenty-eight".