28333880 has 16 divisors (see below), whose sum is σ = 63751320. Its totient is φ = 11333536.

The previous prime is 28333873. The next prime is 28333889. The reversal of 28333880 is 8833382.

It is a self number, because there is not a number n which added to its sum of digits gives 28333880.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333889) 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, 354134 + ... + 354213.

Almost surely, 2^28333880 is an apocalyptic number.

28333880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28333880 is an abundant number, since it is smaller than the sum of its proper divisors (35417440).

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

28333880 is a wasteful number, since it uses less digits than its factorization.

28333880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708358 (or 708354 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28333880 is about 5322.9578243680. The cubic root of 28333880 is about 304.8611031091.

The spelling of 28333880 in words is "twenty-eight million, three hundred thirty-three thousand, eight hundred eighty".