28038336 has 28 divisors (see below), whose sum is σ = 74185272. Its totient is φ = 9346048.

The previous prime is 28038299. The next prime is 28038337. The reversal of 28038336 is 63383082.

It is a super-2 number, since 2×28038336² = 1572296571297792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28038297 and 28038306.

It is not an unprimeable number, because it can be changed into a prime (28038337) 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, 72825 + ... + 73208.

It is an arithmetic number, because the mean of its divisors is an integer number (2649474).

Almost surely, 2^28038336 is an apocalyptic number.

It is an amenable number.

28038336 is an abundant number, since it is smaller than the sum of its proper divisors (46146936).

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

28038336 is a wasteful number, since it uses less digits than its factorization.

28038336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146048 (or 146038 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 28038336 is about 5295.1237945869. The cubic root of 28038336 is about 303.7974181252.

The spelling of 28038336 in words is "twenty-eight million, thirty-eight thousand, three hundred thirty-six".