28081336 has 16 divisors (see below), whose sum is σ = 53033400. Its totient is φ = 13939104.

The previous prime is 28081253. The next prime is 28081337. The reversal of 28081336 is 63318082.

It is a super-2 number, since 2×28081336² = 1577122863089792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28081298 and 28081307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28081337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11515 + ... + 13738.

Almost surely, 2^28081336 is an apocalyptic number.

It is an amenable number.

28081336 is a deficient number, since it is larger than the sum of its proper divisors (24952064).

28081336 is a wasteful number, since it uses less digits than its factorization.

28081336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25398 (or 25394 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28081336 is about 5299.1825784738. The cubic root of 28081336 is about 303.9526415146.

The spelling of 28081336 in words is "twenty-eight million, eighty-one thousand, three hundred thirty-six".