91024140 has 48 divisors (see below), whose sum is σ = 256048128. Its totient is φ = 24160704.

The previous prime is 91024067. The next prime is 91024169. The reversal of 91024140 is 4142019.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9979 + ... + 16781.

It is an arithmetic number, because the mean of its divisors is an integer number (5334336).

Almost surely, 2^91024140 is an apocalyptic number.

It is an amenable number.

91024140 is an abundant number, since it is smaller than the sum of its proper divisors (165023988).

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

91024140 is a wasteful number, since it uses less digits than its factorization.

91024140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038 (or 7036 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 91024140 is about 9540.6572100668. The cubic root of 91024140 is about 449.8339140172.

Adding to 91024140 its reverse (4142019), we get a palindrome (95166159).

The spelling of 91024140 in words is "ninety-one million, twenty-four thousand, one hundred forty".