720705222 has 32 divisors (see below), whose sum is σ = 1605052800. Its totient is φ = 239712264.

The previous prime is 720705221. The next prime is 720705281. The reversal of 720705222 is 222507027.

It is a happy number.

720705222 is a `hidden beast` number, since 72 + 0 + 70 + 522 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720705221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10929 + ... + 39507.

It is an arithmetic number, because the mean of its divisors is an integer number (50157900).

Almost surely, 2^720705222 is an apocalyptic number.

720705222 is an abundant number, since it is smaller than the sum of its proper divisors (884347578).

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

720705222 is a wasteful number, since it uses less digits than its factorization.

720705222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29057 (or 29051 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 720705222 is about 26845.9535498369. The cubic root of 720705222 is about 896.5734820836.

The spelling of 720705222 in words is "seven hundred twenty million, seven hundred five thousand, two hundred twenty-two".