28097577 has 8 divisors (see below), whose sum is σ = 41626080. Its totient is φ = 18731700.

The previous prime is 28097539. The next prime is 28097591. The reversal of 28097577 is 77579082.

It is not a de Polignac number, because 28097577 - 2¹⁶ = 28032041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28097507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520299 + ... + 520352.

It is an arithmetic number, because the mean of its divisors is an integer number (5203260).

Almost surely, 2^28097577 is an apocalyptic number.

28097577 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28097577 is a deficient number, since it is larger than the sum of its proper divisors (13528503).

28097577 is a wasteful number, since it uses less digits than its factorization.

28097577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040660 (or 1040654 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 28097577 is about 5300.7147631239. The cubic root of 28097577 is about 304.0112277998.

The spelling of 28097577 in words is "twenty-eight million, ninety-seven thousand, five hundred seventy-seven".