28797890 has 16 divisors (see below), whose sum is σ = 56548800. Its totient is φ = 10471920.

The previous prime is 28797889. The next prime is 28797907. The reversal of 28797890 is 9879782.

It is a happy number.

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, 130790 + ... + 131009.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^28797890 is an apocalyptic number.

28797890 is a deficient number, since it is larger than the sum of its proper divisors (27750910).

28797890 is a wasteful number, since it uses less digits than its factorization.

28797890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261817.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 28797890 is about 5366.3665547556. The cubic root of 28797890 is about 306.5162870667.

The spelling of 28797890 in words is "twenty-eight million, seven hundred ninety-seven thousand, eight hundred ninety".