28773028 has 6 divisors (see below), whose sum is σ = 50352806. Its totient is φ = 14386512.

The previous prime is 28773007. The next prime is 28773037. The reversal of 28773028 is 82037782.

It can be written as a sum of positive squares in only one way, i.e., 28494244 + 278784 = 5338^2 + 528^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3596625 + ... + 3596632.

Almost surely, 2^28773028 is an apocalyptic number.

It is an amenable number.

28773028 is a deficient number, since it is larger than the sum of its proper divisors (21579778).

28773028 is a wasteful number, since it uses less digits than its factorization.

28773028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7193261 (or 7193259 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 28773028 is about 5364.0495896291. The cubic root of 28773028 is about 306.4280537273.

The spelling of 28773028 in words is "twenty-eight million, seven hundred seventy-three thousand, twenty-eight".