9181037940 has 24 divisors (see below), whose sum is σ = 25706906400. Its totient is φ = 2448276768.

The previous prime is 9181037933. The next prime is 9181037941. The reversal of 9181037940 is 497301819.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9181037892 and 9181037901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9181037941) 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, 76508590 + ... + 76508709.

It is an arithmetic number, because the mean of its divisors is an integer number (1071121100).

Almost surely, 2^9181037940 is an apocalyptic number.

It is an amenable number.

9181037940 is an abundant number, since it is smaller than the sum of its proper divisors (16525868460).

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

9181037940 is a wasteful number, since it uses less digits than its factorization.

9181037940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153017311 (or 153017309 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 9181037940 is about 95817.7329099369. The cubic root of 9181037940 is about 2093.9385254287.

The spelling of 9181037940 in words is "nine billion, one hundred eighty-one million, thirty-seven thousand, nine hundred forty".