28497798 has 32 divisors (see below), whose sum is σ = 72376320. Its totient is φ = 8142120.

The previous prime is 28497769. The next prime is 28497803. The reversal of 28497798 is 89779482.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37318 + ... + 38073.

It is an arithmetic number, because the mean of its divisors is an integer number (2261760).

Almost surely, 2^28497798 is an apocalyptic number.

28497798 is an abundant number, since it is smaller than the sum of its proper divisors (43878522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28497798 is a wasteful number, since it uses less digits than its factorization.

28497798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75409 (or 75403 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 28497798 is about 5338.3328858362. The cubic root of 28497798 is about 305.4478701869.

The spelling of 28497798 in words is "twenty-eight million, four hundred ninety-seven thousand, seven hundred ninety-eight".