126183640 has 144 divisors (see below), whose sum is σ = 333627840. Its totient is φ = 42873600.

The previous prime is 126183623. The next prime is 126183647. The reversal of 126183640 is 46381621.

It is a happy number.

It is a super-2 number, since 2×126183640² = 31844622007299200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126183647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4070425 + ... + 4070455.

It is an arithmetic number, because the mean of its divisors is an integer number (2316860).

Almost surely, 2^126183640 is an apocalyptic number.

126183640 is a gapful number since it is divisible by the number (10) 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 126183640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166813920).

126183640 is an abundant number, since it is smaller than the sum of its proper divisors (207444200).

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

126183640 is a wasteful number, since it uses less digits than its factorization.

126183640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 126183640 is about 11233.1491577384. The cubic root of 126183640 is about 501.5732313611.

The spelling of 126183640 in words is "one hundred twenty-six million, one hundred eighty-three thousand, six hundred forty".