28789474 has 16 divisors (see below), whose sum is σ = 50404608. Its totient is φ = 12075552.

The previous prime is 28789471. The next prime is 28789487. The reversal of 28789474 is 47498782.

It is not an unprimeable number, because it can be changed into a prime (28789471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21219 + ... + 22534.

It is an arithmetic number, because the mean of its divisors is an integer number (3150288).

Almost surely, 2^28789474 is an apocalyptic number.

28789474 is a deficient number, since it is larger than the sum of its proper divisors (21615134).

28789474 is a wasteful number, since it uses less digits than its factorization.

28789474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43809.

The product of its digits is 903168, while the sum is 49.

The square root of 28789474 is about 5365.5823542277. The cubic root of 28789474 is about 306.4864250131.

The spelling of 28789474 in words is "twenty-eight million, seven hundred eighty-nine thousand, four hundred seventy-four".