91790436 has 24 divisors (see below), whose sum is σ = 218736000. Its totient is φ = 29945632.

The previous prime is 91790383. The next prime is 91790437. The reversal of 91790436 is 63409719.

It is a junction number, because it is equal to n+sod(n) for n = 91790394 and 91790403.

It is not an unprimeable number, because it can be changed into a prime (91790437) 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 7 ways as a sum of consecutive naturals, for example, 80811 + ... + 81938.

It is an arithmetic number, because the mean of its divisors is an integer number (9114000).

Almost surely, 2^91790436 is an apocalyptic number.

It is an amenable number.

91790436 is an abundant number, since it is smaller than the sum of its proper divisors (126945564).

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

91790436 is a wasteful number, since it uses less digits than its factorization.

91790436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162803 (or 162801 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 91790436 is about 9580.7325398427. The cubic root of 91790436 is about 451.0927123750.

The spelling of 91790436 in words is "ninety-one million, seven hundred ninety thousand, four hundred thirty-six".