28423056 has 40 divisors (see below), whose sum is σ = 74152000. Its totient is φ = 9380736.

The previous prime is 28423039. The next prime is 28423081. The reversal of 28423056 is 65032482.

It is a super-2 number, since 2×28423056² = 1615740224758272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (1853800).

Almost surely, 2^28423056 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 28423056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37076000).

28423056 is an abundant number, since it is smaller than the sum of its proper divisors (45728944).

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

28423056 is a wasteful number, since it uses less digits than its factorization.

28423056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863 (or 5857 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28423056 is about 5331.3277895849. The cubic root of 28423056 is about 305.1806007342.

The spelling of 28423056 in words is "twenty-eight million, four hundred twenty-three thousand, fifty-six".