28554920 has 16 divisors (see below), whose sum is σ = 64248660. Its totient is φ = 11421952.

The previous prime is 28554919. The next prime is 28554941. The reversal of 28554920 is 2945582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28536964 + 17956 = 5342^2 + 134^2 .

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, 356897 + ... + 356976.

Almost surely, 2^28554920 is an apocalyptic number.

28554920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28554920 is an abundant number, since it is smaller than the sum of its proper divisors (35693740).

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

28554920 is a wasteful number, since it uses less digits than its factorization.

28554920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713884 (or 713880 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 28554920 is about 5343.6803796634. The cubic root of 28554920 is about 305.6518175065.

The spelling of 28554920 in words is "twenty-eight million, five hundred fifty-four thousand, nine hundred twenty".