28461328 has 20 divisors (see below), whose sum is σ = 63021760. Its totient is φ = 12197664.

The previous prime is 28461289. The next prime is 28461337. The reversal of 28461328 is 82316482.

It is a junction number, because it is equal to n+sod(n) for n = 28461293 and 28461302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126948 + ... + 127171.

It is an arithmetic number, because the mean of its divisors is an integer number (3151088).

Almost surely, 2^28461328 is an apocalyptic number.

28461328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28461328 is an abundant number, since it is smaller than the sum of its proper divisors (34560432).

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

28461328 is a wasteful number, since it uses less digits than its factorization.

28461328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254134 (or 254128 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 28461328 is about 5334.9159318587. The cubic root of 28461328 is about 305.3175157972.

The spelling of 28461328 in words is "twenty-eight million, four hundred sixty-one thousand, three hundred twenty-eight".