28597399 has 2 divisors, whose sum is σ = 28597400. Its totient is φ = 28597398.

The previous prime is 28597397. The next prime is 28597423. The reversal of 28597399 is 99379582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28597399 - 2¹ = 28597397 is a prime.

It is a super-2 number, since 2×28597399² = 1635622459130402, which contains 22 as substring.

Together with 28597397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28597397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14298699 + 14298700.

It is an arithmetic number, because the mean of its divisors is an integer number (14298700).

Almost surely, 2^28597399 is an apocalyptic number.

28597399 is a deficient number, since it is larger than the sum of its proper divisors (1).

28597399 is an equidigital number, since it uses as much as digits as its factorization.

28597399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 52.

The square root of 28597399 is about 5347.6535976071. The cubic root of 28597399 is about 305.8033074603.

The spelling of 28597399 in words is "twenty-eight million, five hundred ninety-seven thousand, three hundred ninety-nine".