722234240 has 128 divisors (see below), whose sum is σ = 2125206720. Its totient is φ = 228556800.

The previous prime is 722234237. The next prime is 722234263. The reversal of 722234240 is 42432227.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52040 + ... + 64440.

Almost surely, 2^722234240 is an apocalyptic number.

722234240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722234240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1062603360).

722234240 is an abundant number, since it is smaller than the sum of its proper divisors (1402972480).

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

722234240 is a wasteful number, since it uses less digits than its factorization.

722234240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12440 (or 12428 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 722234240 is about 26874.4160866799. The cubic root of 722234240 is about 897.2070784679.

Adding to 722234240 its reverse (42432227), we get a palindrome (764666467).

The spelling of 722234240 in words is "seven hundred twenty-two million, two hundred thirty-four thousand, two hundred forty".