28577669 has 2 divisors, whose sum is σ = 28577670. Its totient is φ = 28577668.

The previous prime is 28577657. The next prime is 28577693. The reversal of 28577669 is 96677582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15108769 + 13468900 = 3887^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 28577669 - 2²⁰ = 27529093 is a prime.

It is a super-2 number, since 2×28577669² = 1633366330947122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28577609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14288834 + 14288835.

It is an arithmetic number, because the mean of its divisors is an integer number (14288835).

Almost surely, 2^28577669 is an apocalyptic number.

It is an amenable number.

28577669 is a deficient number, since it is larger than the sum of its proper divisors (1).

28577669 is an equidigital number, since it uses as much as digits as its factorization.

28577669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 28577669 is about 5345.8085450192. The cubic root of 28577669 is about 305.7329643808.

The spelling of 28577669 in words is "twenty-eight million, five hundred seventy-seven thousand, six hundred sixty-nine".