91464828 has 144 divisors (see below), whose sum is σ = 280385280. Its totient is φ = 22643712.

The previous prime is 91464797. The next prime is 91464829. The reversal of 91464828 is 82846419.

It is a super-2 number, since 2×91464828² = 16731629522139168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 91464828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91464829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241143 + ... + 241521.

It is an arithmetic number, because the mean of its divisors is an integer number (1947120).

Almost surely, 2^91464828 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 91464828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140192640).

91464828 is an abundant number, since it is smaller than the sum of its proper divisors (188920452).

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

91464828 is a wasteful number, since it uses less digits than its factorization.

91464828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 421 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 91464828 is about 9563.7245882554. The cubic root of 91464828 is about 450.5586937258.

The spelling of 91464828 in words is "ninety-one million, four hundred sixty-four thousand, eight hundred twenty-eight".