It is a sphenic number, since it is the product of 3 distinct primes.
726401622 is an admirable number.
It is a self number, because there is not a number n which added to its sum of digits gives 726401622.
It is a congruent number.
It is an unprimeable number.
Almost surely, 2726401622 is an apocalyptic number.
726401622 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
726401622 is a wasteful number, since it uses less digits than its factorization.
726401622 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 121066942.
The square root of 726401622 is about 26951.8389354048. The cubic root of 726401622 is about 898.9294356936.
The spelling of 726401622 in words is "seven hundred twenty-six million, four hundred one thousand, six hundred twenty-two".