28722190 has 16 divisors (see below), whose sum is σ = 59085792. Its totient is φ = 9847584.

The previous prime is 28722179. The next prime is 28722229. The reversal of 28722190 is 9122782.

It is a super-2 number, since 2×28722190² = 1649928396792200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205089 + ... + 205228.

It is an arithmetic number, because the mean of its divisors is an integer number (3692862).

Almost surely, 2^28722190 is an apocalyptic number.

28722190 is an abundant number, since it is smaller than the sum of its proper divisors (30363602).

28722190 is a wasteful number, since it uses less digits than its factorization.

28722190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410331.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28722190 is about 5359.3087240800. The cubic root of 28722190 is about 306.2474751978.

The spelling of 28722190 in words is "twenty-eight million, seven hundred twenty-two thousand, one hundred ninety".