28553418 has 64 divisors (see below), whose sum is σ = 67415040. Its totient is φ = 8942400.

The previous prime is 28553383. The next prime is 28553443. The reversal of 28553418 is 81435582.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61708 + ... + 62168.

It is an arithmetic number, because the mean of its divisors is an integer number (1053360).

Almost surely, 2^28553418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28553418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33707520).

28553418 is an abundant number, since it is smaller than the sum of its proper divisors (38861622).

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

28553418 is a wasteful number, since it uses less digits than its factorization.

28553418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 28553418 is about 5343.5398379726. The cubic root of 28553418 is about 305.6464582773.

The spelling of 28553418 in words is "twenty-eight million, five hundred fifty-three thousand, four hundred eighteen".