28201580 has 24 divisors (see below), whose sum is σ = 64607760. Its totient is φ = 10255040.

The previous prime is 28201561. The next prime is 28201597. The reversal of 28201580 is 8510282.

It is a super-2 number, since 2×28201580² = 1590658228992800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63875 + ... + 64314.

It is an arithmetic number, because the mean of its divisors is an integer number (2691990).

Almost surely, 2^28201580 is an apocalyptic number.

28201580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28201580 is an abundant number, since it is smaller than the sum of its proper divisors (36406180).

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

28201580 is a wasteful number, since it uses less digits than its factorization.

28201580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128209 (or 128207 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28201580 is about 5310.5159824635. The cubic root of 28201580 is about 304.3858644737.

The spelling of 28201580 in words is "twenty-eight million, two hundred one thousand, five hundred eighty".