91804844 has 12 divisors (see below), whose sum is σ = 165000864. Its totient is φ = 44661744.

The previous prime is 91804837. The next prime is 91804847. The reversal of 91804844 is 44840819.

It is a junction number, because it is equal to n+sod(n) for n = 91804798 and 91804807.

It is not an unprimeable number, because it can be changed into a prime (91804847) 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, 310004 + ... + 310299.

It is an arithmetic number, because the mean of its divisors is an integer number (13750072).

Almost surely, 2^91804844 is an apocalyptic number.

It is an amenable number.

91804844 is a deficient number, since it is larger than the sum of its proper divisors (73196020).

91804844 is a wasteful number, since it uses less digits than its factorization.

91804844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620344 (or 620342 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 91804844 is about 9581.4844361404. The cubic root of 91804844 is about 451.1163132498.

It can be divided in two parts, 91804 and 844, that multiplied together give a triangular number (77482576 = T₁₂₄₄₈).

The spelling of 91804844 in words is "ninety-one million, eight hundred four thousand, eight hundred forty-four".