91038838 has 8 divisors (see below), whose sum is σ = 148972680. Its totient is φ = 41381280.

The previous prime is 91038821. The next prime is 91038839. The reversal of 91038838 is 83883019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 91038838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91038839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2069043 + ... + 2069086.

It is an arithmetic number, because the mean of its divisors is an integer number (18621585).

Almost surely, 2^91038838 is an apocalyptic number.

91038838 is a deficient number, since it is larger than the sum of its proper divisors (57933842).

91038838 is a wasteful number, since it uses less digits than its factorization.

91038838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138142.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 91038838 is about 9541.4274613393. The cubic root of 91038838 is about 449.8581248219.

The spelling of 91038838 in words is "ninety-one million, thirty-eight thousand, eight hundred thirty-eight".