91830642 has 16 divisors (see below), whose sum is σ = 186178080. Its totient is φ = 30190752.

The previous prime is 91830623. The next prime is 91830643. The reversal of 91830642 is 24603819.

It is not an unprimeable number, because it can be changed into a prime (91830643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104392 + ... + 105267.

It is an arithmetic number, because the mean of its divisors is an integer number (11636130).

Almost surely, 2^91830642 is an apocalyptic number.

91830642 is an abundant number, since it is smaller than the sum of its proper divisors (94347438).

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

91830642 is a wasteful number, since it uses less digits than its factorization.

91830642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209737.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 91830642 is about 9582.8305839141. The cubic root of 91830642 is about 451.1585652277.

The spelling of 91830642 in words is "ninety-one million, eight hundred thirty thousand, six hundred forty-two".