28919196 has 18 divisors (see below), whose sum is σ = 73101392. Its totient is φ = 9639720.

The previous prime is 28919183. The next prime is 28919201. The reversal of 28919196 is 69191982.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 401620 + ... + 401691.

Almost surely, 2^28919196 is an apocalyptic number.

It is an amenable number.

28919196 is an abundant number, since it is smaller than the sum of its proper divisors (44182196).

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

28919196 is a wasteful number, since it uses less digits than its factorization.

28919196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803321 (or 803316 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 28919196 is about 5377.6571106756. The cubic root of 28919196 is about 306.9460659921.

It can be divided in two parts, 2 and 8919196, that added together give a palindrome (8919198).

The spelling of 28919196 in words is "twenty-eight million, nine hundred nineteen thousand, one hundred ninety-six".