91140408 has 48 divisors (see below), whose sum is σ = 248118000. Its totient is φ = 30222720.

The previous prime is 91140389. The next prime is 91140419. The reversal of 91140408 is 80404119.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11148 + ... + 17508.

It is an arithmetic number, because the mean of its divisors is an integer number (5169125).

Almost surely, 2^91140408 is an apocalyptic number.

It is an amenable number.

91140408 is an abundant number, since it is smaller than the sum of its proper divisors (156977592).

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

91140408 is a wasteful number, since it uses less digits than its factorization.

91140408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572 (or 6565 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 91140408 is about 9546.7485564458. The cubic root of 91140408 is about 450.0253615336.

The spelling of 91140408 in words is "ninety-one million, one hundred forty thousand, four hundred eight".