726422136 has 128 divisors (see below), whose sum is σ = 2108332800. Its totient is φ = 206254080.

The previous prime is 726422129. The next prime is 726422153. The reversal of 726422136 is 631224627.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 726422097 and 726422106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485806 + ... + 487298.

It is an arithmetic number, because the mean of its divisors is an integer number (16471350).

Almost surely, 2^726422136 is an apocalyptic number.

726422136 is a gapful number since it is divisible by the number (76) 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 726422136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054166400).

726422136 is an abundant number, since it is smaller than the sum of its proper divisors (1381910664).

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

726422136 is a wasteful number, since it uses less digits than its factorization.

726422136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1625 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 726422136 is about 26952.2195004419. The cubic root of 726422136 is about 898.9378977089.

The spelling of 726422136 in words is "seven hundred twenty-six million, four hundred twenty-two thousand, one hundred thirty-six".