28347408 has 120 divisors (see below), whose sum is σ = 86119488. Its totient is φ = 9009792.

The previous prime is 28347353. The next prime is 28347409. The reversal of 28347408 is 80474382.

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

It is not an unprimeable number, because it can be changed into a prime (28347409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89266 + ... + 89582.

Almost surely, 2^28347408 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 28347408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43059744).

28347408 is an abundant number, since it is smaller than the sum of its proper divisors (57772080).

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

28347408 is a wasteful number, since it uses less digits than its factorization.

28347408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28347408 is about 5324.2283948005. The cubic root of 28347408 is about 304.9096139945.

The spelling of 28347408 in words is "twenty-eight million, three hundred forty-seven thousand, four hundred eight".