721867088 has 10 divisors (see below), whose sum is σ = 1398617514. Its totient is φ = 360933536.

The previous prime is 721867067. The next prime is 721867103. The reversal of 721867088 is 880768127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 710115904 + 11751184 = 26648^2 + 3428^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22558331 + ... + 22558362.

Almost surely, 2^721867088 is an apocalyptic number.

It is an amenable number.

721867088 is a deficient number, since it is larger than the sum of its proper divisors (676750426).

721867088 is a wasteful number, since it uses less digits than its factorization.

721867088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45116701 (or 45116695 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 47.

The square root of 721867088 is about 26867.5843350309. The cubic root of 721867088 is about 897.0550192097.

The spelling of 721867088 in words is "seven hundred twenty-one million, eight hundred sixty-seven thousand, eighty-eight".