28380460 has 12 divisors (see below), whose sum is σ = 59599008. Its totient is φ = 11352176.

The previous prime is 28380431. The next prime is 28380479. The reversal of 28380460 is 6408382.

It is a happy number.

It is an unprimeable number.

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, 709492 + ... + 709531.

It is an arithmetic number, because the mean of its divisors is an integer number (4966584).

Almost surely, 2^28380460 is an apocalyptic number.

28380460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28380460 is an abundant number, since it is smaller than the sum of its proper divisors (31218548).

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

28380460 is a wasteful number, since it uses less digits than its factorization.

28380460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419032 (or 1419030 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28380460 is about 5327.3314145076. The cubic root of 28380460 is about 305.0280723064.

The spelling of 28380460 in words is "twenty-eight million, three hundred eighty thousand, four hundred sixty".