28951028 has 6 divisors (see below), whose sum is σ = 50664306. Its totient is φ = 14475512.

The previous prime is 28951009. The next prime is 28951033. The reversal of 28951028 is 82015982.

It can be written as a sum of positive squares in only one way, i.e., 19963024 + 8988004 = 4468^2 + 2998^2 .

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, 3618875 + ... + 3618882.

It is an arithmetic number, because the mean of its divisors is an integer number (8444051).

Almost surely, 2^28951028 is an apocalyptic number.

It is an amenable number.

28951028 is a deficient number, since it is larger than the sum of its proper divisors (21713278).

28951028 is a wasteful number, since it uses less digits than its factorization.

28951028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7237761 (or 7237759 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28951028 is about 5380.6159498704. The cubic root of 28951028 is about 307.0586454753.

The spelling of 28951028 in words is "twenty-eight million, nine hundred fifty-one thousand, twenty-eight".