720737226 has 36 divisors (see below), whose sum is σ = 1716471666. Its totient is φ = 218404560.

The previous prime is 720737221. The next prime is 720737239. The reversal of 720737226 is 622737027.

It can be written as a sum of positive squares in only one way, i.e., 620757225 + 99980001 = 24915^2 + 9999^2 .

It is not an unprimeable number, because it can be changed into a prime (720737221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 163281 + ... + 167636.

Almost surely, 2^720737226 is an apocalyptic number.

720737226 is an abundant number, since it is smaller than the sum of its proper divisors (995734440).

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

720737226 is a wasteful number, since it uses less digits than its factorization.

720737226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330947 (or 330933 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 720737226 is about 26846.5496107042. The cubic root of 720737226 is about 896.5867531188.

The spelling of 720737226 in words is "seven hundred twenty million, seven hundred thirty-seven thousand, two hundred twenty-six".