91420080 has 40 divisors (see below), whose sum is σ = 283402992. Its totient is φ = 24378624.

The previous prime is 91420079. The next prime is 91420111. The reversal of 91420080 is 8002419.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 91420080.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190219 + ... + 190698.

Almost surely, 2^91420080 is an apocalyptic number.

It is an amenable number.

91420080 is an abundant number, since it is smaller than the sum of its proper divisors (191982912).

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

91420080 is a wasteful number, since it uses less digits than its factorization.

91420080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380933 (or 380927 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 91420080 is about 9561.3848369365. The cubic root of 91420080 is about 450.4852050427.

Adding to 91420080 its reverse (8002419), we get a palindrome (99422499).

The spelling of 91420080 in words is "ninety-one million, four hundred twenty thousand, eighty".