28951157 has 2 divisors, whose sum is σ = 28951158. Its totient is φ = 28951156.

The previous prime is 28951129. The next prime is 28951177. The reversal of 28951157 is 75115982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 9006001 = 4466^2 + 3001^2 .

It is a cyclic number.

It is not a de Polignac number, because 28951157 - 2¹⁶ = 28885621 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 28951157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28951127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14475578 + 14475579.

It is an arithmetic number, because the mean of its divisors is an integer number (14475579).

Almost surely, 2^28951157 is an apocalyptic number.

It is an amenable number.

28951157 is a deficient number, since it is larger than the sum of its proper divisors (1).

28951157 is an equidigital number, since it uses as much as digits as its factorization.

28951157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 28951157 is about 5380.6279373322. The cubic root of 28951157 is about 307.0591015386.

The spelling of 28951157 in words is "twenty-eight million, nine hundred fifty-one thousand, one hundred fifty-seven".