28534480 has 40 divisors (see below), whose sum is σ = 71448552. Its totient is φ = 10535424.

The previous prime is 28534423. The next prime is 28534501. The reversal of 28534480 is 8443582.

It can be written as a sum of positive squares in 4 ways, for example, as 571536 + 27962944 = 756^2 + 5288^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12679 + ... + 14758.

Almost surely, 2^28534480 is an apocalyptic number.

28534480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28534480 is an abundant number, since it is smaller than the sum of its proper divisors (42914072).

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

28534480 is a wasteful number, since it uses less digits than its factorization.

28534480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27463 (or 27457 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28534480 is about 5341.7674977483. The cubic root of 28534480 is about 305.5788701892.

The spelling of 28534480 in words is "twenty-eight million, five hundred thirty-four thousand, four hundred eighty".