28129336 has 16 divisors (see below), whose sum is σ = 52802640. Its totient is φ = 14048640.

The previous prime is 28129301. The next prime is 28129393. The reversal of 28129336 is 63392182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9021 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (3300165).

Almost surely, 2^28129336 is an apocalyptic number.

It is an amenable number.

28129336 is a deficient number, since it is larger than the sum of its proper divisors (24673304).

28129336 is a wasteful number, since it uses less digits than its factorization.

28129336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014 (or 4010 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 28129336 is about 5303.7096451446. The cubic root of 28129336 is about 304.1257270810.

The spelling of 28129336 in words is "twenty-eight million, one hundred twenty-nine thousand, three hundred thirty-six".