91078340 has 12 divisors (see below), whose sum is σ = 191264556. Its totient is φ = 36431328.

The previous prime is 91078297. The next prime is 91078363. The reversal of 91078340 is 4387019.

It can be written as a sum of positive squares in 2 ways, for example, as 43771456 + 47306884 = 6616^2 + 6878^2 .

It is a junction number, because it is equal to n+sod(n) for n = 91078297 and 91078306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276939 + ... + 2276978.

It is an arithmetic number, because the mean of its divisors is an integer number (15938713).

Almost surely, 2^91078340 is an apocalyptic number.

It is an amenable number.

91078340 is an abundant number, since it is smaller than the sum of its proper divisors (100186216).

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

91078340 is a wasteful number, since it uses less digits than its factorization.

91078340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553926 (or 4553924 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 91078340 is about 9543.4972625343. The cubic root of 91078340 is about 449.9231803025.

The spelling of 91078340 in words is "ninety-one million, seventy-eight thousand, three hundred forty".