28828888 has 32 divisors (see below), whose sum is σ = 59693760. Its totient is φ = 12942880.

The previous prime is 28828861. The next prime is 28828901. The reversal of 28828888 is 88882882.

It is a happy number.

It is a super-2 number, since 2×28828888² = 1662209566633088, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5331 + ... + 9277.

It is an arithmetic number, because the mean of its divisors is an integer number (1865430).

Almost surely, 2^28828888 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 28828888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29846880).

28828888 is an abundant number, since it is smaller than the sum of its proper divisors (30864872).

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

28828888 is a wasteful number, since it uses less digits than its factorization.

28828888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047 (or 4043 counting only the distinct ones).

The product of its digits is 1048576, while the sum is 52.

The square root of 28828888 is about 5369.2539519006. The cubic root of 28828888 is about 306.6262255010.

The spelling of 28828888 in words is "twenty-eight million, eight hundred twenty-eight thousand, eight hundred eighty-eight".