28785460 has 24 divisors (see below), whose sum is σ = 65945376. Its totient is φ = 10467360.

The previous prime is 28785457. The next prime is 28785469. The reversal of 28785460 is 6458782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785469) 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, 65202 + ... + 65641.

It is an arithmetic number, because the mean of its divisors is an integer number (2747724).

Almost surely, 2^28785460 is an apocalyptic number.

28785460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28785460 is an abundant number, since it is smaller than the sum of its proper divisors (37159916).

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

28785460 is a wasteful number, since it uses less digits than its factorization.

28785460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130863 (or 130861 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 28785460 is about 5365.2082904581. The cubic root of 28785460 is about 306.4721802965.

It can be divided in two parts, 2878 and 5460, that added together give a palindrome (8338).

The spelling of 28785460 in words is "twenty-eight million, seven hundred eighty-five thousand, four hundred sixty".