28788190 has 8 divisors (see below), whose sum is σ = 51818760. Its totient is φ = 11515272.

The previous prime is 28788187. The next prime is 28788223. The reversal of 28788190 is 9188782.

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

It is a super-2 number, since 2×28788190² = 1657519766952200, which contains 22 as substring.

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, 1439400 + ... + 1439419.

It is an arithmetic number, because the mean of its divisors is an integer number (6477345).

Almost surely, 2^28788190 is an apocalyptic number.

28788190 is a deficient number, since it is larger than the sum of its proper divisors (23030570).

28788190 is a wasteful number, since it uses less digits than its factorization.

28788190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878826.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 28788190 is about 5365.4627013893. The cubic root of 28788190 is about 306.4818685512.

The spelling of 28788190 in words is "twenty-eight million, seven hundred eighty-eight thousand, one hundred ninety".