28551456 has 36 divisors (see below), whose sum is σ = 81194022. Its totient is φ = 9517056.

The previous prime is 28551451. The next prime is 28551473. The reversal of 28551456 is 65415582.

It can be written as a sum of positive squares in only one way, i.e., 28259856 + 291600 = 5316^2 + 540^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 28551456.

It is not an unprimeable number, because it can be changed into a prime (28551451) 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 5 ways as a sum of consecutive naturals, for example, 49281 + ... + 49856.

Almost surely, 2^28551456 is an apocalyptic number.

It is an amenable number.

28551456 is an abundant number, since it is smaller than the sum of its proper divisors (52642566).

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

28551456 is a wasteful number, since it uses less digits than its factorization.

28551456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99153 (or 99142 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 28551456 is about 5343.3562486512. The cubic root of 28551456 is about 305.6394574565.

The spelling of 28551456 in words is "twenty-eight million, five hundred fifty-one thousand, four hundred fifty-six".