126722440 has 64 divisors (see below), whose sum is σ = 308347200. Its totient is φ = 46593792.

The previous prime is 126722429. The next prime is 126722441. The reversal of 126722440 is 44227621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 126722399 and 126722408.

It is not an unprimeable number, because it can be changed into a prime (126722441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196759 + ... + 197401.

It is an arithmetic number, because the mean of its divisors is an integer number (4817925).

Almost surely, 2^126722440 is an apocalyptic number.

126722440 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 126722440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154173600).

126722440 is an abundant number, since it is smaller than the sum of its proper divisors (181624760).

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

126722440 is a wasteful number, since it uses less digits than its factorization.

126722440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 126722440 is about 11257.1062000853. The cubic root of 126722440 is about 502.2861180644.

The spelling of 126722440 in words is "one hundred twenty-six million, seven hundred twenty-two thousand, four hundred forty".