28314478 has 4 divisors (see below), whose sum is σ = 42471720. Its totient is φ = 14157238.

The previous prime is 28314467. The next prime is 28314487. The reversal of 28314478 is 87441382.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078618 + ... + 7078621.

It is an arithmetic number, because the mean of its divisors is an integer number (10617930).

Almost surely, 2^28314478 is an apocalyptic number.

28314478 is a deficient number, since it is larger than the sum of its proper divisors (14157242).

28314478 is a wasteful number, since it uses less digits than its factorization.

28314478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14157241.

The product of its digits is 43008, while the sum is 37.

The square root of 28314478 is about 5321.1350292959. The cubic root of 28314478 is about 304.7915013257.

The spelling of 28314478 in words is "twenty-eight million, three hundred fourteen thousand, four hundred seventy-eight".