91243776 has 216 divisors, whose sum is σ = 284279520. Its totient is φ = 25878528.

The previous prime is 91243759. The next prime is 91243837. The reversal of 91243776 is 67734219.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2466030 + ... + 2466066.

Almost surely, 2^91243776 is an apocalyptic number.

91243776 is a gapful number since it is divisible by the number (96) 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 91243776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142139760).

91243776 is an abundant number, since it is smaller than the sum of its proper divisors (193035744).

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

91243776 is a wasteful number, since it uses less digits than its factorization.

91243776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 74 counting only the distinct ones).

The product of its digits is 63504, while the sum is 39.

The square root of 91243776 is about 9552.1608026666. The cubic root of 91243776 is about 450.1954311630.

The spelling of 91243776 in words is "ninety-one million, two hundred forty-three thousand, seven hundred seventy-six".