28415604 has 48 divisors (see below), whose sum is σ = 77547008. Its totient is φ = 7928928.

The previous prime is 28415539. The next prime is 28415617. The reversal of 28415604 is 40651482.

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 15 ways as a sum of consecutive naturals, for example, 322 + ... + 7545.

Almost surely, 2^28415604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28415604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38773504).

28415604 is an abundant number, since it is smaller than the sum of its proper divisors (49131404).

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

28415604 is a wasteful number, since it uses less digits than its factorization.

28415604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924 (or 7922 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28415604 is about 5330.6288559606. The cubic root of 28415604 is about 305.1539274985.

The spelling of 28415604 in words is "twenty-eight million, four hundred fifteen thousand, six hundred four".