28677712 has 40 divisors (see below), whose sum is σ = 64120896. Its totient is φ = 12170496.

The previous prime is 28677709. The next prime is 28677713. The reversal of 28677712 is 21777682.

It is a super-2 number, since 2×28677712² = 1644822331109888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28677713) 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, 10788 + ... + 13180.

Almost surely, 2^28677712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28677712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32060448).

28677712 is an abundant number, since it is smaller than the sum of its proper divisors (35443184).

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

28677712 is a wasteful number, since it uses less digits than its factorization.

28677712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515 (or 2509 counting only the distinct ones).

The product of its digits is 65856, while the sum is 40.

The square root of 28677712 is about 5355.1575140233. The cubic root of 28677712 is about 306.0893127878.

The spelling of 28677712 in words is "twenty-eight million, six hundred seventy-seven thousand, seven hundred twelve".