722539740 has 96 divisors (see below), whose sum is σ = 2193710400. Its totient is φ = 176633856.

The previous prime is 722539721. The next prime is 722539777. The reversal of 722539740 is 47935227.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 113112 + ... + 119328.

It is an arithmetic number, because the mean of its divisors is an integer number (22851150).

Almost surely, 2^722539740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722539740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096855200).

722539740 is an abundant number, since it is smaller than the sum of its proper divisors (1471170660).

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

722539740 is a wasteful number, since it uses less digits than its factorization.

722539740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6391 (or 6389 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 722539740 is about 26880.0993301736. The cubic root of 722539740 is about 897.3335647284. Note that the first 3 decimals are identical.

The spelling of 722539740 in words is "seven hundred twenty-two million, five hundred thirty-nine thousand, seven hundred forty".