28830540 has 24 divisors (see below), whose sum is σ = 80725680. Its totient is φ = 7688128.

The previous prime is 28830539. The next prime is 28830563. The reversal of 28830540 is 4503882.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28830498 and 28830507.

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, 240195 + ... + 240314.

It is an arithmetic number, because the mean of its divisors is an integer number (3363570).

Almost surely, 2^28830540 is an apocalyptic number.

28830540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28830540 is an abundant number, since it is smaller than the sum of its proper divisors (51895140).

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

28830540 is a wasteful number, since it uses less digits than its factorization.

28830540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480521 (or 480519 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28830540 is about 5369.4077885741. The cubic root of 28830540 is about 306.6320823213.

The spelling of 28830540 in words is "twenty-eight million, eight hundred thirty thousand, five hundred forty".