91014840 has 160 divisors (see below), whose sum is σ = 349699680. Its totient is φ = 20798208.

The previous prime is 91014823. The next prime is 91014851. The reversal of 91014840 is 4841019.

It is a super-2 number, since 2×91014840² = 16567402200451200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20674 + ... + 24686.

It is an arithmetic number, because the mean of its divisors is an integer number (2185623).

Almost surely, 2^91014840 is an apocalyptic number.

91014840 is a gapful number since it is divisible by the number (90) 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 91014840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174849840).

91014840 is an abundant number, since it is smaller than the sum of its proper divisors (258684840).

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

91014840 is a wasteful number, since it uses less digits than its factorization.

91014840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043 (or 4030 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 91014840 is about 9540.1698098095. The cubic root of 91014840 is about 449.8185935469.

Adding to 91014840 its reverse (4841019), we get a palindrome (95855859).

The spelling of 91014840 in words is "ninety-one million, fourteen thousand, eight hundred forty".