28187076 has 24 divisors (see below), whose sum is σ = 65860704. Its totient is φ = 9382720.

The previous prime is 28187057. The next prime is 28187077. The reversal of 28187076 is 67078182.

It is a super-2 number, since 2×28187076² = 1589022506859552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28187077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12016 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (2744196).

Almost surely, 2^28187076 is an apocalyptic number.

It is an amenable number.

28187076 is an abundant number, since it is smaller than the sum of its proper divisors (37673628).

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

28187076 is a wasteful number, since it uses less digits than its factorization.

28187076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251 (or 3249 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 28187076 is about 5309.1502144882. The cubic root of 28187076 is about 304.3336739033. Note that the first 3 decimals are identical.

The spelling of 28187076 in words is "twenty-eight million, one hundred eighty-seven thousand, seventy-six".