28334480 has 20 divisors (see below), whose sum is σ = 65877852. Its totient is φ = 11333760.

The previous prime is 28334473. The next prime is 28334519. The reversal of 28334480 is 8443382.

It can be written as a sum of positive squares in 2 ways, for example, as 19784704 + 8549776 = 4448^2 + 2924^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 177011 + ... + 177170.

Almost surely, 2^28334480 is an apocalyptic number.

28334480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28334480 is an abundant number, since it is smaller than the sum of its proper divisors (37543372).

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

28334480 is a wasteful number, since it uses less digits than its factorization.

28334480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354194 (or 354188 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 28334480 is about 5323.0141837121. The cubic root of 28334480 is about 304.8632550132.

The spelling of 28334480 in words is "twenty-eight million, three hundred thirty-four thousand, four hundred eighty".