28795580 has 72 divisors (see below), whose sum is σ = 67791696. Its totient is φ = 10264320.

The previous prime is 28795577. The next prime is 28795597. The reversal of 28795580 is 8559782.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176579 + ... + 176741.

Almost surely, 2^28795580 is an apocalyptic number.

28795580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28795580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33895848).

28795580 is an abundant number, since it is smaller than the sum of its proper divisors (38996116).

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

28795580 is a wasteful number, since it uses less digits than its factorization.

28795580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 28795580 is about 5366.1513210121. The cubic root of 28795580 is about 306.5080911936.

The spelling of 28795580 in words is "twenty-eight million, seven hundred ninety-five thousand, five hundred eighty".