720223021590 has 64 divisors (see below), whose sum is σ = 1778363009280. Its totient is φ = 186541246080.

The previous prime is 720223021559. The next prime is 720223021621. The reversal of 720223021590 is 95120322027.

It is an interprime number because it is at equal distance from previous prime (720223021559) and next prime (720223021621).

It is a super-2 number, since 2×720223021590² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65641 + ... + 1201979.

It is an arithmetic number, because the mean of its divisors is an integer number (27786922020).

Almost surely, 2^720223021590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720223021590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889181504640).

720223021590 is an abundant number, since it is smaller than the sum of its proper divisors (1058139987690).

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

720223021590 is a wasteful number, since it uses less digits than its factorization.

720223021590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136957.

The product of its (nonzero) digits is 15120, while the sum is 33.

The spelling of 720223021590 in words is "seven hundred twenty billion, two hundred twenty-three million, twenty-one thousand, five hundred ninety".