726561402 has 64 divisors (see below), whose sum is σ = 1762974720. Its totient is φ = 194870016.

The previous prime is 726561373. The next prime is 726561403. The reversal of 726561402 is 204165627.

It is not an unprimeable number, because it can be changed into a prime (726561403) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 332349 + ... + 334527.

It is an arithmetic number, because the mean of its divisors is an integer number (27546480).

Almost surely, 2^726561402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726561402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (881487360).

726561402 is an abundant number, since it is smaller than the sum of its proper divisors (1036413318).

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

726561402 is a wasteful number, since it uses less digits than its factorization.

726561402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 726561402 is about 26954.8029486398. The cubic root of 726561402 is about 898.9953406564.

The spelling of 726561402 in words is "seven hundred twenty-six million, five hundred sixty-one thousand, four hundred two".