91795780 has 24 divisors (see below), whose sum is σ = 192951360. Its totient is φ = 36684000.

The previous prime is 91795741. The next prime is 91795787. The reversal of 91795780 is 8759719.

It is a self number, because there is not a number n which added to its sum of digits gives 91795780.

It is not an unprimeable number, because it can be changed into a prime (91795787) 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, 39655 + ... + 41905.

It is an arithmetic number, because the mean of its divisors is an integer number (8039640).

Almost surely, 2^91795780 is an apocalyptic number.

It is an amenable number.

91795780 is an abundant number, since it is smaller than the sum of its proper divisors (101155580).

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

91795780 is a wasteful number, since it uses less digits than its factorization.

91795780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299 (or 4297 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 91795780 is about 9581.0114288628. The cubic root of 91795780 is about 451.1014663469.

The spelling of 91795780 in words is "ninety-one million, seven hundred ninety-five thousand, seven hundred eighty".