28557452 has 36 divisors (see below), whose sum is σ = 62786640. Its totient is φ = 11124960.

The previous prime is 28557439. The next prime is 28557457. The reversal of 28557452 is 25475582.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28557457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 827 + ... + 7602.

Almost surely, 2^28557452 is an apocalyptic number.

28557452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28557452 is an abundant number, since it is smaller than the sum of its proper divisors (34229188).

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

28557452 is a wasteful number, since it uses less digits than its factorization.

28557452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8462 (or 8449 counting only the distinct ones).

The product of its digits is 112000, while the sum is 38.

The square root of 28557452 is about 5343.9172897791. The cubic root of 28557452 is about 305.6608514141.

The spelling of 28557452 in words is "twenty-eight million, five hundred fifty-seven thousand, four hundred fifty-two".