91070940 has 24 divisors (see below), whose sum is σ = 254998800. Its totient is φ = 24285568.

The previous prime is 91070939. The next prime is 91070953. The reversal of 91070940 is 4907019.

It is a super-2 number, since 2×91070940² = 16587832224967200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 91070898 and 91070907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 758865 + ... + 758984.

It is an arithmetic number, because the mean of its divisors is an integer number (10624950).

Almost surely, 2^91070940 is an apocalyptic number.

It is an amenable number.

91070940 is an abundant number, since it is smaller than the sum of its proper divisors (163927860).

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

91070940 is a wasteful number, since it uses less digits than its factorization.

91070940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517861 (or 1517859 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 91070940 is about 9543.1095561143. The cubic root of 91070940 is about 449.9109947425.

Adding to 91070940 its reverse (4907019), we get a palindrome (95977959).

The spelling of 91070940 in words is "ninety-one million, seventy thousand, nine hundred forty".