28470506 has 4 divisors (see below), whose sum is σ = 42705762. Its totient is φ = 14235252.

The previous prime is 28470499. The next prime is 28470613. The reversal of 28470506 is 60507482.

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., 28462225 + 8281 = 5335^2 + 91^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7117625 + ... + 7117628.

Almost surely, 2^28470506 is an apocalyptic number.

28470506 is a deficient number, since it is larger than the sum of its proper divisors (14235256).

28470506 is a wasteful number, since it uses less digits than its factorization.

28470506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14235255.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28470506 is about 5335.7760447755. The cubic root of 28470506 is about 305.3503311200.

Adding to 28470506 its reverse (60507482), we get a palindrome (88977988).

The spelling of 28470506 in words is "twenty-eight million, four hundred seventy thousand, five hundred six".