28785998 has 8 divisors (see below), whose sum is σ = 45718992. Its totient is φ = 13546336.

The previous prime is 28785983. The next prime is 28786001. The reversal of 28785998 is 89958782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423290 + ... + 423357.

It is an arithmetic number, because the mean of its divisors is an integer number (5714874).

Almost surely, 2^28785998 is an apocalyptic number.

28785998 is a deficient number, since it is larger than the sum of its proper divisors (16932994).

28785998 is a wasteful number, since it uses less digits than its factorization.

28785998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846666.

The product of its digits is 2903040, while the sum is 56.

The square root of 28785998 is about 5365.2584280722. The cubic root of 28785998 is about 306.4740896054.

The spelling of 28785998 in words is "twenty-eight million, seven hundred eighty-five thousand, nine hundred ninety-eight".