28478484 has 36 divisors (see below), whose sum is σ = 73067904. Its totient is φ = 9350352.

The previous prime is 28478467. The next prime is 28478497. The reversal of 28478484 is 48487482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×28478484² = 1622048101876512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3492 + ... + 8315.

It is an arithmetic number, because the mean of its divisors is an integer number (2029664).

Almost surely, 2^28478484 is an apocalyptic number.

It is an amenable number.

28478484 is an abundant number, since it is smaller than the sum of its proper divisors (44589420).

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

28478484 is a wasteful number, since it uses less digits than its factorization.

28478484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11884 (or 11879 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The square root of 28478484 is about 5336.5235875053. The cubic root of 28478484 is about 305.3788501944.

The spelling of 28478484 in words is "twenty-eight million, four hundred seventy-eight thousand, four hundred eighty-four".