10721768 has 8 divisors (see below), whose sum is σ = 20103330. Its totient is φ = 5360880.

The previous prime is 10721761. The next prime is 10721771. The reversal of 10721768 is 86712701.

10721768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8168164 + 2553604 = 2858^2 + 1598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×10721768² = 229912618091648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10721761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670103 + ... + 670118.

Almost surely, 2^10721768 is an apocalyptic number.

It is an amenable number.

10721768 is a deficient number, since it is larger than the sum of its proper divisors (9381562).

10721768 is a wasteful number, since it uses less digits than its factorization.

10721768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340227 (or 1340223 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 10721768 is about 3274.4110920897. The cubic root of 10721768 is about 220.5068753502.

The spelling of 10721768 in words is "ten million, seven hundred twenty-one thousand, seven hundred sixty-eight".