28639792 has 10 divisors (see below), whose sum is σ = 55489628. Its totient is φ = 14319888.

The previous prime is 28639789. The next prime is 28639799. The reversal of 28639792 is 29793682.

It is not an unprimeable number, because it can be changed into a prime (28639799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 894978 + ... + 895009.

Almost surely, 2^28639792 is an apocalyptic number.

It is an amenable number.

28639792 is a deficient number, since it is larger than the sum of its proper divisors (26849836).

28639792 is a wasteful number, since it uses less digits than its factorization.

28639792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789995 (or 1789989 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 28639792 is about 5351.6158307562. The cubic root of 28639792 is about 305.9543412303.

The spelling of 28639792 in words is "twenty-eight million, six hundred thirty-nine thousand, seven hundred ninety-two".