28648580 has 24 divisors (see below), whose sum is σ = 63329280. Its totient is φ = 10856160.

The previous prime is 28648573. The next prime is 28648601. The reversal of 28648580 is 8584682.

It is a super-2 number, since 2×28648580² = 1641482272032800, 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, 37316 + ... + 38075.

It is an arithmetic number, because the mean of its divisors is an integer number (2638720).

Almost surely, 2^28648580 is an apocalyptic number.

28648580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28648580 is an abundant number, since it is smaller than the sum of its proper divisors (34680700).

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

28648580 is a wasteful number, since it uses less digits than its factorization.

28648580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75419 (or 75417 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 28648580 is about 5352.4368282120. The cubic root of 28648580 is about 305.9856316320.

The spelling of 28648580 in words is "twenty-eight million, six hundred forty-eight thousand, five hundred eighty".