722040881 has 4 divisors (see below), whose sum is σ = 764513892. Its totient is φ = 679567872.

The previous prime is 722040877. The next prime is 722040899. The reversal of 722040881 is 188040227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188040227 = 41 ⋅4586347.

It can be written as a sum of positive squares in 2 ways, for example, as 666672400 + 55368481 = 25820^2 + 7441^2 .

It is a cyclic number.

It is not a de Polignac number, because 722040881 - 2² = 722040877 is a prime.

It is a super-2 number, since 2×722040881² = 1042686067670512322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722040841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21236480 + ... + 21236513.

It is an arithmetic number, because the mean of its divisors is an integer number (191128473).

Almost surely, 2^722040881 is an apocalyptic number.

It is an amenable number.

722040881 is a deficient number, since it is larger than the sum of its proper divisors (42473011).

722040881 is a wasteful number, since it uses less digits than its factorization.

722040881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42473010.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 722040881 is about 26870.8183909609. The cubic root of 722040881 is about 897.1270035476.

The spelling of 722040881 in words is "seven hundred twenty-two million, forty thousand, eight hundred eighty-one".