28754720 has 24 divisors (see below), whose sum is σ = 67933404. Its totient is φ = 11501824.

The previous prime is 28754717. The next prime is 28754723. The reversal of 28754720 is 2745782.

It is an interprime number because it is at equal distance from previous prime (28754717) and next prime (28754723).

It can be written as a sum of positive squares in 2 ways, for example, as 24960016 + 3794704 = 4996^2 + 1948^2 .

It is not an unprimeable number, because it can be changed into a prime (28754723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89699 + ... + 90018.

Almost surely, 2^28754720 is an apocalyptic number.

28754720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28754720 is an abundant number, since it is smaller than the sum of its proper divisors (39178684).

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

28754720 is a wasteful number, since it uses less digits than its factorization.

28754720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179732 (or 179724 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 28754720 is about 5362.3427715878. The cubic root of 28754720 is about 306.3630475334.

The spelling of 28754720 in words is "twenty-eight million, seven hundred fifty-four thousand, seven hundred twenty".