91026442 has 24 divisors (see below), whose sum is σ = 151313184. Its totient is φ = 41028624.

The previous prime is 91026427. The next prime is 91026443. The reversal of 91026442 is 24462019.

It is a self number, because there is not a number n which added to its sum of digits gives 91026442.

It is not an unprimeable number, because it can be changed into a prime (91026443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11403 + ... + 17665.

It is an arithmetic number, because the mean of its divisors is an integer number (6304716).

Almost surely, 2^91026442 is an apocalyptic number.

91026442 is a deficient number, since it is larger than the sum of its proper divisors (60286742).

91026442 is a wasteful number, since it uses less digits than its factorization.

91026442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6334 (or 6321 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 91026442 is about 9540.7778508883. Note that the first 3 decimals coincide. The cubic root of 91026442 is about 449.8377060843.

The spelling of 91026442 in words is "ninety-one million, twenty-six thousand, four hundred forty-two".