720278244 has 189 divisors, whose sum is σ = 2229815091. Its totient is φ = 202895280.

The previous prime is 720278231. The next prime is 720278257. The reversal of 720278244 is 442872027.

The square root of 720278244 is 26838.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (720278231) and next prime (720278257).

It is a tau number, because it is divible by the number of its divisors (189).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 720278199 and 720278208.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 10144729 + ... + 10144799.

Almost surely, 2^720278244 is an apocalyptic number.

720278244 is the 26838-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720278244

720278244 is an abundant number, since it is smaller than the sum of its proper divisors (1509536847).

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

720278244 is an equidigital number, since it uses as much as digits as its factorization.

720278244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The cubic root of 720278244 is about 896.3963903663.

Multiplying 720278244 by its sum of digits (36), we get a square (25930016784 = 161028²).

720278244 divided by its sum of digits (36) gives a square (20007729 = 4473²).

Multiplying 720278244 by its product of nonzero digits (50176), we get a square (36140681170944 = 6011712²).

The spelling of 720278244 in words is "seven hundred twenty million, two hundred seventy-eight thousand, two hundred forty-four".