28992577 has 2 divisors, whose sum is σ = 28992578. Its totient is φ = 28992576.

The previous prime is 28992563. The next prime is 28992589. The reversal of 28992577 is 77529982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 11943936 = 4129^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 28992577 - 2¹¹ = 28990529 is a prime.

It is a super-2 number, since 2×28992577² = 1681139042201858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28992577.

It is not a weakly prime, because it can be changed into another prime (28992377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14496288 + 14496289.

It is an arithmetic number, because the mean of its divisors is an integer number (14496289).

Almost surely, 2^28992577 is an apocalyptic number.

It is an amenable number.

28992577 is a deficient number, since it is larger than the sum of its proper divisors (1).

28992577 is an equidigital number, since it uses as much as digits as its factorization.

28992577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 28992577 is about 5384.4755547778. The cubic root of 28992577 is about 307.2054667595.

It can be divided in two parts, 2899 and 2577, that added together give a square (5476 = 74²).

The spelling of 28992577 in words is "twenty-eight million, nine hundred ninety-two thousand, five hundred seventy-seven".