28468978 has 16 divisors (see below), whose sum is σ = 43529760. Its totient is φ = 13961376.

The previous prime is 28468949. The next prime is 28469017. The reversal of 28468978 is 87986482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32713 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (2720610).

Almost surely, 2^28468978 is an apocalyptic number.

28468978 is a deficient number, since it is larger than the sum of its proper divisors (15060782).

28468978 is a wasteful number, since it uses less digits than its factorization.

28468978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161.

The product of its digits is 1548288, while the sum is 52.

The square root of 28468978 is about 5335.6328584339. The cubic root of 28468978 is about 305.3448683480.

The spelling of 28468978 in words is "twenty-eight million, four hundred sixty-eight thousand, nine hundred seventy-eight".