91946780 has 48 divisors (see below), whose sum is σ = 199463040. Its totient is φ = 35585088.

The previous prime is 91946779. The next prime is 91946783. The reversal of 91946780 is 8764919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91946783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78479 + ... + 79641.

It is an arithmetic number, because the mean of its divisors is an integer number (4155480).

Almost surely, 2^91946780 is an apocalyptic number.

It is an amenable number.

91946780 is an abundant number, since it is smaller than the sum of its proper divisors (107516260).

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

91946780 is a wasteful number, since it uses less digits than its factorization.

91946780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 91946780 is about 9588.8883610145. Note that the first 3 decimals coincide. The cubic root of 91946780 is about 451.3486781688.

The spelling of 91946780 in words is "ninety-one million, nine hundred forty-six thousand, seven hundred eighty".