726121650 has 48 divisors (see below), whose sum is σ = 1842676704. Its totient is φ = 189127680.

The previous prime is 726121637. The next prime is 726121667. The reversal of 726121650 is 56121627.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49839 + ... + 62738.

It is an arithmetic number, because the mean of its divisors is an integer number (38389098).

Almost surely, 2^726121650 is an apocalyptic number.

726121650 is an abundant number, since it is smaller than the sum of its proper divisors (1116555054).

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

726121650 is a wasteful number, since it uses less digits than its factorization.

726121650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112635 (or 112630 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 726121650 is about 26946.6445035370. The cubic root of 726121650 is about 898.8139314487.

The spelling of 726121650 in words is "seven hundred twenty-six million, one hundred twenty-one thousand, six hundred fifty".