28773884 has 12 divisors (see below), whose sum is σ = 50405208. Its totient is φ = 14372400.

The previous prime is 28773881. The next prime is 28773893. The reversal of 28773884 is 48837782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28773881) 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, 1679 + ... + 7769.

It is an arithmetic number, because the mean of its divisors is an integer number (4200434).

Almost surely, 2^28773884 is an apocalyptic number.

It is an amenable number.

28773884 is a deficient number, since it is larger than the sum of its proper divisors (21631324).

28773884 is a wasteful number, since it uses less digits than its factorization.

28773884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276 (or 7274 counting only the distinct ones).

The product of its digits is 602112, while the sum is 47.

The square root of 28773884 is about 5364.1293794986. The cubic root of 28773884 is about 306.4310924506.

The spelling of 28773884 in words is "twenty-eight million, seven hundred seventy-three thousand, eight hundred eighty-four".