28447404 has 24 divisors (see below), whose sum is σ = 66468528. Its totient is φ = 9469440.

The previous prime is 28447369. The next prime is 28447421. The reversal of 28447404 is 40474482.

It is a congruent number.

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, 12084 + ... + 14244.

It is an arithmetic number, because the mean of its divisors is an integer number (2769522).

Almost surely, 2^28447404 is an apocalyptic number.

It is an amenable number.

28447404 is an abundant number, since it is smaller than the sum of its proper divisors (38021124).

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

28447404 is a wasteful number, since it uses less digits than its factorization.

28447404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 33.

The square root of 28447404 is about 5333.6107844499. The cubic root of 28447404 is about 305.2677179973.

The spelling of 28447404 in words is "twenty-eight million, four hundred forty-seven thousand, four hundred four".