28018190 has 8 divisors (see below), whose sum is σ = 50432760. Its totient is φ = 11207272.

The previous prime is 28018187. The next prime is 28018247. The reversal of 28018190 is 9181082.

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

It is a super-2 number, since 2×28018190² = 1570037941752200, 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, 1400900 + ... + 1400919.

It is an arithmetic number, because the mean of its divisors is an integer number (6304095).

Almost surely, 2^28018190 is an apocalyptic number.

28018190 is a deficient number, since it is larger than the sum of its proper divisors (22414570).

28018190 is a wasteful number, since it uses less digits than its factorization.

28018190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801826.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 28018190 is about 5293.2211365104. The cubic root of 28018190 is about 303.7246395645.

The spelling of 28018190 in words is "twenty-eight million, eighteen thousand, one hundred ninety".