28899918 has 12 divisors (see below), whose sum is σ = 62616528. Its totient is φ = 9633300.

The previous prime is 28899917. The next prime is 28899929. The reversal of 28899918 is 81999882.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28899917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 802758 + ... + 802793.

It is an arithmetic number, because the mean of its divisors is an integer number (5218044).

Almost surely, 2^28899918 is an apocalyptic number.

28899918 is an abundant number, since it is smaller than the sum of its proper divisors (33716610).

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

28899918 is a wasteful number, since it uses less digits than its factorization.

28899918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605559 (or 1605556 counting only the distinct ones).

The product of its digits is 746496, while the sum is 54.

The square root of 28899918 is about 5375.8643956112. The cubic root of 28899918 is about 306.8778457737.

The spelling of 28899918 in words is "twenty-eight million, eight hundred ninety-nine thousand, nine hundred eighteen".