28757260 has 72 divisors (see below), whose sum is σ = 72969120. Its totient is φ = 9324288.

The previous prime is 28757231. The next prime is 28757269. The reversal of 28757260 is 6275782.

It is not an unprimeable number, because it can be changed into a prime (28757269) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 50256 + ... + 50824.

It is an arithmetic number, because the mean of its divisors is an integer number (1013460).

Almost surely, 2^28757260 is an apocalyptic number.

28757260 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 28757260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36484560).

28757260 is an abundant number, since it is smaller than the sum of its proper divisors (44211860).

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

28757260 is a wasteful number, since it uses less digits than its factorization.

28757260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 28757260 is about 5362.5796031388. The cubic root of 28757260 is about 306.3720679566.

The spelling of 28757260 in words is "twenty-eight million, seven hundred fifty-seven thousand, two hundred sixty".