720321444 has 24 divisors (see below), whose sum is σ = 1867500320. Its totient is φ = 240107112.

The previous prime is 720321421. The next prime is 720321449. The reversal of 720321444 is 444123027.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (720321449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3334714 + ... + 3334929.

Almost surely, 2^720321444 is an apocalyptic number.

It is an amenable number.

720321444 is an abundant number, since it is smaller than the sum of its proper divisors (1147178876).

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

720321444 is a wasteful number, since it uses less digits than its factorization.

720321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669656 (or 6669648 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 720321444 is about 26838.8048169064. The cubic root of 720321444 is about 896.4143110102.

The spelling of 720321444 in words is "seven hundred twenty million, three hundred twenty-one thousand, four hundred forty-four".