28751650 has 12 divisors (see below), whose sum is σ = 53478162. Its totient is φ = 11500640.

The previous prime is 28751647. The next prime is 28751651. The reversal of 28751650 is 5615782.

It can be written as a sum of positive squares in 3 ways, for example, as 11785489 + 16966161 = 3433^2 + 4119^2 .

It is not an unprimeable number, because it can be changed into a prime (28751651) 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, 287467 + ... + 287566.

Almost surely, 2^28751650 is an apocalyptic number.

28751650 is a deficient number, since it is larger than the sum of its proper divisors (24726512).

28751650 is a wasteful number, since it uses less digits than its factorization.

28751650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575045 (or 575040 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 28751650 is about 5362.0565084676. The cubic root of 28751650 is about 306.3521441869.

The spelling of 28751650 in words is "twenty-eight million, seven hundred fifty-one thousand, six hundred fifty".