28455408 has 80 divisors (see below), whose sum is σ = 82336000. Its totient is φ = 9408960.

The previous prime is 28455397. The next prime is 28455421. The reversal of 28455408 is 80455482.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85803 + ... + 86133.

It is an arithmetic number, because the mean of its divisors is an integer number (1029200).

Almost surely, 2^28455408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28455408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41168000).

28455408 is an abundant number, since it is smaller than the sum of its proper divisors (53880592).

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

28455408 is a wasteful number, since it uses less digits than its factorization.

28455408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 28455408 is about 5334.3610676444. The cubic root of 28455408 is about 305.2963454916.

The spelling of 28455408 in words is "twenty-eight million, four hundred fifty-five thousand, four hundred eight".