91833820 has 48 divisors (see below), whose sum is σ = 209690208. Its totient is φ = 33580800.

The previous prime is 91833799. The next prime is 91833823. The reversal of 91833820 is 2833819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91833823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26170 + ... + 29470.

It is an arithmetic number, because the mean of its divisors is an integer number (4368546).

Almost surely, 2^91833820 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 91833820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104845104).

91833820 is an abundant number, since it is smaller than the sum of its proper divisors (117856388).

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

91833820 is a wasteful number, since it uses less digits than its factorization.

91833820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 91833820 is about 9582.9963998741. The cubic root of 91833820 is about 451.1637696103.

The spelling of 91833820 in words is "ninety-one million, eight hundred thirty-three thousand, eight hundred twenty".