40185731922 has 96 divisors (see below), whose sum is σ = 94603438080. Its totient is φ = 11346048000.

The previous prime is 40185731917. The next prime is 40185731941. The reversal of 40185731922 is 22913758104.

It is a super-2 number, since 2×40185731922² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10041922 + ... + 10045922.

It is an arithmetic number, because the mean of its divisors is an integer number (985452480).

Almost surely, 2^40185731922 is an apocalyptic number.

40185731922 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40185731922, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47301719040).

40185731922 is an abundant number, since it is smaller than the sum of its proper divisors (54417706158).

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

40185731922 is a wasteful number, since it uses less digits than its factorization.

40185731922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 40185731922 in words is "forty billion, one hundred eighty-five million, seven hundred thirty-one thousand, nine hundred twenty-two".