91028394 has 16 divisors (see below), whose sum is σ = 202285440. Its totient is φ = 30342780.

The previous prime is 91028383. The next prime is 91028423. The reversal of 91028394 is 49382019.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 842802 + ... + 842909.

It is an arithmetic number, because the mean of its divisors is an integer number (12642840).

Almost surely, 2^91028394 is an apocalyptic number.

91028394 is an abundant number, since it is smaller than the sum of its proper divisors (111257046).

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

91028394 is a wasteful number, since it uses less digits than its factorization.

91028394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685722 (or 1685716 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 91028394 is about 9540.8801480786. The cubic root of 91028394 is about 449.8409215490.

The spelling of 91028394 in words is "ninety-one million, twenty-eight thousand, three hundred ninety-four".