28630757 has 2 divisors, whose sum is σ = 28630758. Its totient is φ = 28630756.

The previous prime is 28630717. The next prime is 28630769. The reversal of 28630757 is 75703682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14485636 + 14145121 = 3806^2 + 3761^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630757 - 2²² = 24436453 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28630757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28630717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315378 + 14315379.

It is an arithmetic number, because the mean of its divisors is an integer number (14315379).

Almost surely, 2^28630757 is an apocalyptic number.

It is an amenable number.

28630757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630757 is an equidigital number, since it uses as much as digits as its factorization.

28630757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 28630757 is about 5350.7716265974. The cubic root of 28630757 is about 305.9221646906.

The spelling of 28630757 in words is "twenty-eight million, six hundred thirty thousand, seven hundred fifty-seven".