28988190 has 192 divisors, whose sum is σ = 97044480. Its totient is φ = 5829120.

The previous prime is 28988171. The next prime is 28988207. The reversal of 28988190 is 9188982.

It is a super-2 number, since 2×28988190² = 1680630318952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 325666 + ... + 325754.

It is an arithmetic number, because the mean of its divisors is an integer number (505440).

Almost surely, 2^28988190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28988190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48522240).

28988190 is an abundant number, since it is smaller than the sum of its proper divisors (68056290).

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

28988190 is a wasteful number, since it uses less digits than its factorization.

28988190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 28988190 is about 5384.0681645016. The cubic root of 28988190 is about 307.1899710878.

The spelling of 28988190 in words is "twenty-eight million, nine hundred eighty-eight thousand, one hundred ninety".