28799951 has 2 divisors, whose sum is σ = 28799952. Its totient is φ = 28799950.

The previous prime is 28799941. The next prime is 28799963. The reversal of 28799951 is 15999782.

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-28799951 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28799951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28799941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399975 + 14399976.

It is an arithmetic number, because the mean of its divisors is an integer number (14399976).

Almost surely, 2^28799951 is an apocalyptic number.

28799951 is a deficient number, since it is larger than the sum of its proper divisors (1).

28799951 is an equidigital number, since it uses as much as digits as its factorization.

28799951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The square root of 28799951 is about 5366.5585806921. The cubic root of 28799951 is about 306.5235991186.

The spelling of 28799951 in words is "twenty-eight million, seven hundred ninety-nine thousand, nine hundred fifty-one".