28189416 has 32 divisors (see below), whose sum is σ = 72748800. Its totient is φ = 9093120.

The previous prime is 28189409. The next prime is 28189423. The reversal of 28189416 is 61498182.

It is an interprime number because it is at equal distance from previous prime (28189409) and next prime (28189423).

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, 18201 + ... + 19688.

It is an arithmetic number, because the mean of its divisors is an integer number (2273400).

Almost surely, 2^28189416 is an apocalyptic number.

It is an amenable number.

28189416 is an abundant number, since it is smaller than the sum of its proper divisors (44559384).

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

28189416 is a wasteful number, since it uses less digits than its factorization.

28189416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37929 (or 37925 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 28189416 is about 5309.3705841653. The cubic root of 28189416 is about 304.3420952698.

The spelling of 28189416 in words is "twenty-eight million, one hundred eighty-nine thousand, four hundred sixteen".