28811480 has 32 divisors (see below), whose sum is σ = 64983600. Its totient is φ = 11496576.

The previous prime is 28811473. The next prime is 28811491. The reversal of 28811480 is 8411882.

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, 25814 + ... + 26906.

Almost surely, 2^28811480 is an apocalyptic number.

28811480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28811480 is an abundant number, since it is smaller than the sum of its proper divisors (36172120).

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

28811480 is a wasteful number, since it uses less digits than its factorization.

28811480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 32.

The square root of 28811480 is about 5367.6326252828. The cubic root of 28811480 is about 306.5644954743.

The spelling of 28811480 in words is "twenty-eight million, eight hundred eleven thousand, four hundred eighty".