91092378 has 32 divisors (see below), whose sum is σ = 197116416. Its totient is φ = 27897408.

The previous prime is 91092371. The next prime is 91092383. The reversal of 91092378 is 87329019.

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

It is not an unprimeable number, because it can be changed into a prime (91092371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14776 + ... + 20012.

It is an arithmetic number, because the mean of its divisors is an integer number (6159888).

Almost surely, 2^91092378 is an apocalyptic number.

91092378 is an abundant number, since it is smaller than the sum of its proper divisors (106024038).

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

91092378 is a wasteful number, since it uses less digits than its factorization.

91092378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5478.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 91092378 is about 9544.2327088143. The cubic root of 91092378 is about 449.9462948254.

The spelling of 91092378 in words is "ninety-one million, ninety-two thousand, three hundred seventy-eight".