40123231092 has 120 divisors (see below), whose sum is σ = 120377537280. Its totient is φ = 11415660480.

The previous prime is 40123231073. The next prime is 40123231163. The reversal of 40123231092 is 29013232104.

It is a happy number.

40123231092 is a `hidden beast` number, since 401 + 23 + 231 + 0 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 505042 + ... + 579062.

It is an arithmetic number, because the mean of its divisors is an integer number (1003146144).

Almost surely, 2^40123231092 is an apocalyptic number.

40123231092 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40123231092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60188768640).

40123231092 is an abundant number, since it is smaller than the sum of its proper divisors (80254306188).

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

40123231092 is a wasteful number, since it uses less digits than its factorization.

40123231092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74283 (or 74272 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 40123231092 its reverse (29013232104), we get a palindrome (69136463196).

The spelling of 40123231092 in words is "forty billion, one hundred twenty-three million, two hundred thirty-one thousand, ninety-two".