28937089 has 2 divisors, whose sum is σ = 28937090. Its totient is φ = 28937088.

The previous prime is 28937063. The next prime is 28937093. The reversal of 28937089 is 98073982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26863489 + 2073600 = 5183^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 28937089 - 2¹³ = 28928897 is a prime.

It is not a weakly prime, because it can be changed into another prime (28937039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14468544 + 14468545.

It is an arithmetic number, because the mean of its divisors is an integer number (14468545).

Almost surely, 2^28937089 is an apocalyptic number.

It is an amenable number.

28937089 is a deficient number, since it is larger than the sum of its proper divisors (1).

28937089 is an equidigital number, since it uses as much as digits as its factorization.

28937089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 28937089 is about 5379.3204961222. The cubic root of 28937089 is about 307.0093579042.

The spelling of 28937089 in words is "twenty-eight million, nine hundred thirty-seven thousand, eighty-nine".