28415344 has 40 divisors (see below), whose sum is σ = 57853440. Its totient is φ = 13502400.

The previous prime is 28415339. The next prime is 28415351. The reversal of 28415344 is 44351482.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 28779 + ... + 29749.

It is an arithmetic number, because the mean of its divisors is an integer number (1446336).

Almost surely, 2^28415344 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 28415344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28926720).

28415344 is an abundant number, since it is smaller than the sum of its proper divisors (29438096).

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

28415344 is a wasteful number, since it uses less digits than its factorization.

28415344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

The square root of 28415344 is about 5330.6044685383. The cubic root of 28415344 is about 305.1529967861.

The spelling of 28415344 in words is "twenty-eight million, four hundred fifteen thousand, three hundred forty-four".