28154190 has 32 divisors (see below), whose sum is σ = 67838976. Its totient is φ = 7477920.

The previous prime is 28154177. The next prime is 28154197. The reversal of 28154190 is 9145182.

It is a happy number.

It is a super-2 number, since 2×28154190² = 1585316829112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28154197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6399 + ... + 9861.

It is an arithmetic number, because the mean of its divisors is an integer number (2119968).

Almost surely, 2^28154190 is an apocalyptic number.

28154190 is an abundant number, since it is smaller than the sum of its proper divisors (39684786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28154190 is a wasteful number, since it uses less digits than its factorization.

28154190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 28154190 is about 5306.0522047941. The cubic root of 28154190 is about 304.2152719807.

The spelling of 28154190 in words is "twenty-eight million, one hundred fifty-four thousand, one hundred ninety".