28840276 has 12 divisors (see below), whose sum is σ = 50834560. Its totient is φ = 14316120.

The previous prime is 28840249. The next prime is 28840277. The reversal of 28840276 is 67204882.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28840277) 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, 25380 + ... + 26491.

Almost surely, 2^28840276 is an apocalyptic number.

It is an amenable number.

28840276 is a deficient number, since it is larger than the sum of its proper divisors (21994284).

28840276 is a wasteful number, since it uses less digits than its factorization.

28840276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52014 (or 52012 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 28840276 is about 5370.3143297204. The cubic root of 28840276 is about 306.6665947280. Note that the first 3 decimals are identical.

The spelling of 28840276 in words is "twenty-eight million, eight hundred forty thousand, two hundred seventy-six".