28478544 has 40 divisors (see below), whose sum is σ = 74057760. Its totient is φ = 9429888.

The previous prime is 28478537. The next prime is 28478557. The reversal of 28478544 is 44587482.

It is a super-2 number, since 2×28478544² = 1622054936719872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28478496 and 28478505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5647 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (1851444).

Almost surely, 2^28478544 is an apocalyptic number.

28478544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28478544 is an abundant number, since it is smaller than the sum of its proper divisors (45579216).

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

28478544 is a wasteful number, since it uses less digits than its factorization.

28478544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947 (or 3941 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The square root of 28478544 is about 5336.5292091396. The cubic root of 28478544 is about 305.3790646571.

The spelling of 28478544 in words is "twenty-eight million, four hundred seventy-eight thousand, five hundred forty-four".