28617408 has 56 divisors (see below), whose sum is σ = 84134960. Its totient is φ = 9538560.

The previous prime is 28617397. The next prime is 28617427. The reversal of 28617408 is 80471682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6553 + ... + 10008.

It is an arithmetic number, because the mean of its divisors is an integer number (1502410).

Almost surely, 2^28617408 is an apocalyptic number.

It is an amenable number.

28617408 is an abundant number, since it is smaller than the sum of its proper divisors (55517552).

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

28617408 is a wasteful number, since it uses less digits than its factorization.

28617408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16582 (or 16566 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28617408 is about 5349.5240909823. The cubic root of 28617408 is about 305.8746122185.

The spelling of 28617408 in words is "twenty-eight million, six hundred seventeen thousand, four hundred eight".