28697836 has 48 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 12657920.

The previous prime is 28697821. The next prime is 28697839. The reversal of 28697836 is 63879682.

It is a self number, because there is not a number n which added to its sum of digits gives 28697836.

It is not an unprimeable number, because it can be changed into a prime (28697839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92121 + ... + 92431.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^28697836 is an apocalyptic number.

It is an amenable number.

28697836 is a deficient number, since it is larger than the sum of its proper divisors (27911444).

28697836 is a wasteful number, since it uses less digits than its factorization.

28697836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 412 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 28697836 is about 5357.0361208414. The cubic root of 28697836 is about 306.1608933596.

The spelling of 28697836 in words is "twenty-eight million, six hundred ninety-seven thousand, eight hundred thirty-six".