28481594 has 4 divisors (see below), whose sum is σ = 42722394. Its totient is φ = 14240796.

The previous prime is 28481573. The next prime is 28481603. The reversal of 28481594 is 49518482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23396569 + 5085025 = 4837^2 + 2255^2 .

It is a super-2 number, since 2×28481594² = 1622402393561672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7120397 + ... + 7120400.

Almost surely, 2^28481594 is an apocalyptic number.

28481594 is a deficient number, since it is larger than the sum of its proper divisors (14240800).

28481594 is a wasteful number, since it uses less digits than its factorization.

28481594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14240799.

The product of its digits is 92160, while the sum is 41.

The square root of 28481594 is about 5336.8149677500. The cubic root of 28481594 is about 305.3899661144.

The spelling of 28481594 in words is "twenty-eight million, four hundred eighty-one thousand, five hundred ninety-four".