28957797 has 16 divisors (see below), whose sum is σ = 46800960. Its totient is φ = 17550000.

The previous prime is 28957777. The next prime is 28957801. The reversal of 28957797 is 79775982.

It is not a de Polignac number, because 28957797 - 2⁸ = 28957541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28957727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48454 + ... + 49047.

It is an arithmetic number, because the mean of its divisors is an integer number (2925060).

Almost surely, 2^28957797 is an apocalyptic number.

28957797 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28957797 is a deficient number, since it is larger than the sum of its proper divisors (17843163).

28957797 is a wasteful number, since it uses less digits than its factorization.

28957797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97521 (or 97515 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 28957797 is about 5381.2449303112. The cubic root of 28957797 is about 307.0825745969.

The spelling of 28957797 in words is "twenty-eight million, nine hundred fifty-seven thousand, seven hundred ninety-seven".