28528751 has 2 divisors, whose sum is σ = 28528752. Its totient is φ = 28528750.

The previous prime is 28528741. The next prime is 28528781. The reversal of 28528751 is 15782582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28528751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28528741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14264375 + 14264376.

It is an arithmetic number, because the mean of its divisors is an integer number (14264376).

Almost surely, 2^28528751 is an apocalyptic number.

28528751 is a deficient number, since it is larger than the sum of its proper divisors (1).

28528751 is an equidigital number, since it uses as much as digits as its factorization.

28528751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44800, while the sum is 38.

The square root of 28528751 is about 5341.2312251016. The cubic root of 28528751 is about 305.5584179909.

The spelling of 28528751 in words is "twenty-eight million, five hundred twenty-eight thousand, seven hundred fifty-one".