28346920 has 64 divisors (see below), whose sum is σ = 75427200. Its totient is φ = 9381120.

The previous prime is 28346897. The next prime is 28346947. The reversal of 28346920 is 2964382.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6375 + ... + 9865.

It is an arithmetic number, because the mean of its divisors is an integer number (1178550).

Almost surely, 2^28346920 is an apocalyptic number.

28346920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28346920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37713600).

28346920 is an abundant number, since it is smaller than the sum of its proper divisors (47080280).

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

28346920 is a wasteful number, since it uses less digits than its factorization.

28346920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538 (or 3534 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 28346920 is about 5324.1825663664. The cubic root of 28346920 is about 304.9078643138.

The spelling of 28346920 in words is "twenty-eight million, three hundred forty-six thousand, nine hundred twenty".