91568420 has 48 divisors (see below), whose sum is σ = 200406528. Its totient is φ = 35105280.

The previous prime is 91568417. The next prime is 91568437. The reversal of 91568420 is 2486519.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69407 + ... + 70713.

It is an arithmetic number, because the mean of its divisors is an integer number (4175136).

Almost surely, 2^91568420 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 91568420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100203264).

91568420 is an abundant number, since it is smaller than the sum of its proper divisors (108838108).

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

91568420 is a wasteful number, since it uses less digits than its factorization.

91568420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 91568420 is about 9569.1389372294. The cubic root of 91568420 is about 450.7287287268.

It can be divided in two parts, 9156 and 8420, that added together give a cube (17576 = 26³).

The spelling of 91568420 in words is "ninety-one million, five hundred sixty-eight thousand, four hundred twenty".