28494180 has 288 divisors, whose sum is σ = 107872128. Its totient is φ = 6220800.

The previous prime is 28494161. The next prime is 28494187. The reversal of 28494180 is 8149482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28494187) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 694960 + ... + 695000.

It is an arithmetic number, because the mean of its divisors is an integer number (374556).

Almost surely, 2^28494180 is an apocalyptic number.

28494180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28494180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53936064).

28494180 is an abundant number, since it is smaller than the sum of its proper divisors (79377948).

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

28494180 is a wasteful number, since it uses less digits than its factorization.

28494180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28494180 is about 5337.9940052420. The cubic root of 28494180 is about 305.4349433734.

The spelling of 28494180 in words is "twenty-eight million, four hundred ninety-four thousand, one hundred eighty".