91858842 has 12 divisors (see below), whose sum is σ = 199027530. Its totient is φ = 30619608.

The previous prime is 91858817. The next prime is 91858843. The reversal of 91858842 is 24885819.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71419401 + 20439441 = 8451^2 + 4521^2 .

It is not an unprimeable number, because it can be changed into a prime (91858843) 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, 2551617 + ... + 2551652.

Almost surely, 2^91858842 is an apocalyptic number.

91858842 is an abundant number, since it is smaller than the sum of its proper divisors (107168688).

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

91858842 is a wasteful number, since it uses less digits than its factorization.

91858842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103277 (or 5103274 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 91858842 is about 9584.3018525086. The cubic root of 91858842 is about 451.2047421506.

The spelling of 91858842 in words is "ninety-one million, eight hundred fifty-eight thousand, eight hundred forty-two".