28820334 has 16 divisors (see below), whose sum is σ = 60147072. Its totient is φ = 9189048.

The previous prime is 28820291. The next prime is 28820347. The reversal of 28820334 is 43302882.

It is a super-2 number, since 2×28820334² = 1661223303743112, which contains 22 as substring.

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, 104284 + ... + 104559.

It is an arithmetic number, because the mean of its divisors is an integer number (3759192).

Almost surely, 2^28820334 is an apocalyptic number.

28820334 is an abundant number, since it is smaller than the sum of its proper divisors (31326738).

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

28820334 is a wasteful number, since it uses less digits than its factorization.

28820334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208871.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 28820334 is about 5368.4573203109. The cubic root of 28820334 is about 306.5958955048.

The spelling of 28820334 in words is "twenty-eight million, eight hundred twenty thousand, three hundred thirty-four".