28877028 has 48 divisors (see below), whose sum is σ = 69242880. Its totient is φ = 9363744.

The previous prime is 28877021. The next prime is 28877041. The reversal of 28877028 is 82077882.

It is a super-2 number, since 2×28877028² = 1667765492225568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28877021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78501 + ... + 78867.

It is an arithmetic number, because the mean of its divisors is an integer number (1442560).

Almost surely, 2^28877028 is an apocalyptic number.

It is an amenable number.

28877028 is an abundant number, since it is smaller than the sum of its proper divisors (40365852).

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

28877028 is a wasteful number, since it uses less digits than its factorization.

28877028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 28877028 is about 5373.7350139358. The cubic root of 28877028 is about 306.7968041452.

The spelling of 28877028 in words is "twenty-eight million, eight hundred seventy-seven thousand, twenty-eight".