28555744 has 24 divisors (see below), whose sum is σ = 64250928. Its totient is φ = 12238080.

The previous prime is 28555693. The next prime is 28555753. The reversal of 28555744 is 44755582.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28555697 and 28555706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63517 + ... + 63964.

It is an arithmetic number, because the mean of its divisors is an integer number (2677122).

Almost surely, 2^28555744 is an apocalyptic number.

It is an amenable number.

28555744 is an abundant number, since it is smaller than the sum of its proper divisors (35695184).

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

28555744 is a wasteful number, since it uses less digits than its factorization.

28555744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127498 (or 127490 counting only the distinct ones).

The product of its digits is 224000, while the sum is 40.

The square root of 28555744 is about 5343.7574795269. The cubic root of 28555744 is about 305.6547575097.

The spelling of 28555744 in words is "twenty-eight million, five hundred fifty-five thousand, seven hundred forty-four".