726229840 has 40 divisors (see below), whose sum is σ = 1929697920. Its totient is φ = 248992896.

The previous prime is 726229813. The next prime is 726229849. The reversal of 726229840 is 48922627.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 726229793 and 726229802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726229849) 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 7 ways as a sum of consecutive naturals, for example, 647860 + ... + 648979.

It is an arithmetic number, because the mean of its divisors is an integer number (48242448).

Almost surely, 2^726229840 is an apocalyptic number.

726229840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

726229840 is an abundant number, since it is smaller than the sum of its proper divisors (1203468080).

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

726229840 is a wasteful number, since it uses less digits than its factorization.

726229840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296859 (or 1296853 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 726229840 is about 26948.6519143352. The cubic root of 726229840 is about 898.8585694465.

The spelling of 726229840 in words is "seven hundred twenty-six million, two hundred twenty-nine thousand, eight hundred forty".