726697988 has 6 divisors (see below), whose sum is σ = 1271721486. Its totient is φ = 363348992.

The previous prime is 726697987. The next prime is 726698023. The reversal of 726697988 is 889796627.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 576096004 + 150601984 = 24002^2 + 12272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 726697988.

It is not an unprimeable number, because it can be changed into a prime (726697987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90837245 + ... + 90837252.

It is an arithmetic number, because the mean of its divisors is an integer number (211953581).

Almost surely, 2^726697988 is an apocalyptic number.

It is an amenable number.

726697988 is a deficient number, since it is larger than the sum of its proper divisors (545023498).

726697988 is a wasteful number, since it uses less digits than its factorization.

726697988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181674501 (or 181674499 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The square root of 726697988 is about 26957.3364411249. The cubic root of 726697988 is about 899.0516710567.

The spelling of 726697988 in words is "seven hundred twenty-six million, six hundred ninety-seven thousand, nine hundred eighty-eight".