91396780 has 12 divisors (see below), whose sum is σ = 191933280. Its totient is φ = 36558704.

The previous prime is 91396769. The next prime is 91396787. The reversal of 91396780 is 8769319.

It is not an unprimeable number, because it can be changed into a prime (91396787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2284900 + ... + 2284939.

It is an arithmetic number, because the mean of its divisors is an integer number (15994440).

Almost surely, 2^91396780 is an apocalyptic number.

It is an amenable number.

91396780 is an abundant number, since it is smaller than the sum of its proper divisors (100536500).

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

91396780 is a wasteful number, since it uses less digits than its factorization.

91396780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569848 (or 4569846 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 91396780 is about 9560.1663165449. The cubic root of 91396780 is about 450.4469304568.

The spelling of 91396780 in words is "ninety-one million, three hundred ninety-six thousand, seven hundred eighty".