28393452 has 72 divisors (see below), whose sum is σ = 74483136. Its totient is φ = 9114624.

The previous prime is 28393447. The next prime is 28393471. The reversal of 28393452 is 25439382.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164038 + ... + 164210.

It is an arithmetic number, because the mean of its divisors is an integer number (1034488).

Almost surely, 2^28393452 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 28393452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37241568).

28393452 is an abundant number, since it is smaller than the sum of its proper divisors (46089684).

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

28393452 is a wasteful number, since it uses less digits than its factorization.

28393452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 322 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 28393452 is about 5328.5506472211. The cubic root of 28393452 is about 305.0746104310.

The spelling of 28393452 in words is "twenty-eight million, three hundred ninety-three thousand, four hundred fifty-two".