91271480 has 32 divisors (see below), whose sum is σ = 205642800. Its totient is φ = 36458496.

The previous prime is 91271473. The next prime is 91271483. The reversal of 91271480 is 8417219.

It is a super-4 number, since 4×91271480⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91271483) 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, 45131 + ... + 47109.

Almost surely, 2^91271480 is an apocalyptic number.

It is an amenable number.

91271480 is an abundant number, since it is smaller than the sum of its proper divisors (114371320).

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

91271480 is a wasteful number, since it uses less digits than its factorization.

91271480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143 (or 3139 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 91271480 is about 9553.6108356998. The cubic root of 91271480 is about 450.2409902601.

Adding to 91271480 its reverse (8417219), we get a palindrome (99688699).

The spelling of 91271480 in words is "ninety-one million, two hundred seventy-one thousand, four hundred eighty".