10722640 has 20 divisors (see below), whose sum is σ = 24930324. Its totient is φ = 4289024.

The previous prime is 10722619. The next prime is 10722653. The reversal of 10722640 is 4622701.

It can be written as a sum of positive squares in 2 ways, for example, as 4981824 + 5740816 = 2232^2 + 2396^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×10722640² = 229950017139200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66937 + ... + 67096.

Almost surely, 2^10722640 is an apocalyptic number.

10722640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10722640 is an abundant number, since it is smaller than the sum of its proper divisors (14207684).

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

10722640 is a wasteful number, since it uses less digits than its factorization.

10722640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134046 (or 134040 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 10722640 is about 3274.5442430970. The cubic root of 10722640 is about 220.5128531200.

The spelling of 10722640 in words is "ten million, seven hundred twenty-two thousand, six hundred forty".