28494400 has 84 divisors (see below), whose sum is σ = 76535280. Its totient is φ = 10355200.

The previous prime is 28494391. The next prime is 28494437. The reversal of 28494400 is 449482.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16791 + ... + 18409.

Almost surely, 2^28494400 is an apocalyptic number.

28494400 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 28494400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38267640).

28494400 is an abundant number, since it is smaller than the sum of its proper divisors (48040880).

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

28494400 is a wasteful number, since it uses less digits than its factorization.

28494400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28494400 is about 5338.0146121943. The cubic root of 28494400 is about 305.4357294463.

The spelling of 28494400 in words is "twenty-eight million, four hundred ninety-four thousand, four hundred".