91792278 has 48 divisors (see below), whose sum is σ = 209401920. Its totient is φ = 30130056.

The previous prime is 91792277. The next prime is 91792289. The reversal of 91792278 is 87229719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91792277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31153 + ... + 33971.

It is an arithmetic number, because the mean of its divisors is an integer number (4362540).

Almost surely, 2^91792278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91792278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104700960).

91792278 is an abundant number, since it is smaller than the sum of its proper divisors (117609642).

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

91792278 is a wasteful number, since it uses less digits than its factorization.

91792278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903 (or 2891 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 91792278 is about 9580.8286697968. The cubic root of 91792278 is about 451.0957297817.

The spelling of 91792278 in words is "ninety-one million, seven hundred ninety-two thousand, two hundred seventy-eight".