28899338 has 16 divisors (see below), whose sum is σ = 46966920. Its totient is φ = 13336128.

The previous prime is 28899329. The next prime is 28899359. The reversal of 28899338 is 83399882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7711729 + 21187609 = 2777^2 + 4603^2 .

It is a Curzon number.

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, 1106 + ... + 7682.

Almost surely, 2^28899338 is an apocalyptic number.

28899338 is a deficient number, since it is larger than the sum of its proper divisors (18067582).

28899338 is an equidigital number, since it uses as much as digits as its factorization.

28899338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618 (or 6592 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 28899338 is about 5375.8104505274. The cubic root of 28899338 is about 306.8757928228.

The spelling of 28899338 in words is "twenty-eight million, eight hundred ninety-nine thousand, three hundred thirty-eight".