28456994 has 4 divisors (see below), whose sum is σ = 42685494. Its totient is φ = 14228496.

The previous prime is 28456979. The next prime is 28457047. The reversal of 28456994 is 49965482.

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., 19245769 + 9211225 = 4387^2 + 3035^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7114247 + ... + 7114250.

Almost surely, 2^28456994 is an apocalyptic number.

28456994 is a deficient number, since it is larger than the sum of its proper divisors (14228500).

28456994 is a wasteful number, since it uses less digits than its factorization.

28456994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14228499.

The product of its digits is 622080, while the sum is 47.

The square root of 28456994 is about 5334.5097244264. The cubic root of 28456994 is about 305.3020174188.

The spelling of 28456994 in words is "twenty-eight million, four hundred fifty-six thousand, nine hundred ninety-four".