28402190 has 16 divisors (see below), whose sum is σ = 51187680. Its totient is φ = 11346720.

The previous prime is 28402177. The next prime is 28402219. The reversal of 28402190 is 9120482.

It is a super-2 number, since 2×28402190² = 1613368793592200, which contains 22 as substring.

It is a Curzon number.

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, 11135 + ... + 13445.

It is an arithmetic number, because the mean of its divisors is an integer number (3199230).

Almost surely, 2^28402190 is an apocalyptic number.

28402190 is a deficient number, since it is larger than the sum of its proper divisors (22785490).

28402190 is a wasteful number, since it uses less digits than its factorization.

28402190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28402190 is about 5329.3705069173. The cubic root of 28402190 is about 305.1059024878.

The spelling of 28402190 in words is "twenty-eight million, four hundred two thousand, one hundred ninety".