28751480 has 32 divisors (see below), whose sum is σ = 64864800. Its totient is φ = 11469696.

The previous prime is 28751453. The next prime is 28751483. The reversal of 28751480 is 8415782.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28751480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19406 + ... + 20834.

It is an arithmetic number, because the mean of its divisors is an integer number (2027025).

Almost surely, 2^28751480 is an apocalyptic number.

28751480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28751480 is an abundant number, since it is smaller than the sum of its proper divisors (36113320).

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

28751480 is a wasteful number, since it uses less digits than its factorization.

28751480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28751480 is about 5362.0406563173. The cubic root of 28751480 is about 306.3515403959.

The spelling of 28751480 in words is "twenty-eight million, seven hundred fifty-one thousand, four hundred eighty".