91919340 has 288 divisors, whose sum is σ = 330086400. Its totient is φ = 21150720.

The previous prime is 91919329. The next prime is 91919351. The reversal of 91919340 is 4391919.

It is an interprime number because it is at equal distance from previous prime (91919329) and next prime (91919351).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 91919295 and 91919304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2965125 + ... + 2965155.

Almost surely, 2^91919340 is an apocalyptic number.

91919340 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 91919340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165043200).

91919340 is an abundant number, since it is smaller than the sum of its proper divisors (238167060).

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

91919340 is a wasteful number, since it uses less digits than its factorization.

91919340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 91919340 is about 9587.4574314570. The cubic root of 91919340 is about 451.3037745120.

The spelling of 91919340 in words is "ninety-one million, nine hundred nineteen thousand, three hundred forty".