28497915 has 12 divisors (see below), whose sum is σ = 49396464. Its totient is φ = 15198864.

The previous prime is 28497901. The next prime is 28497947. The reversal of 28497915 is 51979482.

It is not a de Polignac number, because 28497915 - 2⁵ = 28497883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 633287 = 28497915 / (2 + 8 + 4 + 9 + 7 + 9 + 1 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316599 + ... + 316688.

It is an arithmetic number, because the mean of its divisors is an integer number (4116372).

Almost surely, 2^28497915 is an apocalyptic number.

28497915 is a deficient number, since it is larger than the sum of its proper divisors (20898549).

28497915 is a wasteful number, since it uses less digits than its factorization.

28497915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633298 (or 633295 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 28497915 is about 5338.3438443023. The cubic root of 28497915 is about 305.4482881999.

The spelling of 28497915 in words is "twenty-eight million, four hundred ninety-seven thousand, nine hundred fifteen".