91380078 has 12 divisors (see below), whose sum is σ = 197990208. Its totient is φ = 30460020.

The previous prime is 91380077. The next prime is 91380089. The reversal of 91380078 is 87008319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91380077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2538318 + ... + 2538353.

It is an arithmetic number, because the mean of its divisors is an integer number (16499184).

Almost surely, 2^91380078 is an apocalyptic number.

91380078 is an abundant number, since it is smaller than the sum of its proper divisors (106610130).

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

91380078 is a wasteful number, since it uses less digits than its factorization.

91380078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076679 (or 5076676 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 91380078 is about 9559.2927562660. The cubic root of 91380078 is about 450.4194903108.

The spelling of 91380078 in words is "ninety-one million, three hundred eighty thousand, seventy-eight".