28912276 has 12 divisors (see below), whose sum is σ = 50716372. Its totient is φ = 14421888.

The previous prime is 28912249. The next prime is 28912277. The reversal of 28912276 is 67221982.

It can be written as a sum of positive squares in 2 ways, for example, as 2656900 + 26255376 = 1630^2 + 5124^2 .

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 (28912277) 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, 6615 + ... + 10078.

Almost surely, 2^28912276 is an apocalyptic number.

It is an amenable number.

28912276 is a deficient number, since it is larger than the sum of its proper divisors (21804096).

28912276 is a wasteful number, since it uses less digits than its factorization.

28912276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17130 (or 17128 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 28912276 is about 5377.0136693150. The cubic root of 28912276 is about 306.9215812610.

The spelling of 28912276 in words is "twenty-eight million, nine hundred twelve thousand, two hundred seventy-six".