720940626 has 72 divisors (see below), whose sum is σ = 1835282124. Its totient is φ = 203918400.

The previous prime is 720940559. The next prime is 720940631. The reversal of 720940626 is 626049027.

It is a happy number.

720940626 is a `hidden beast` number, since 7 + 20 + 9 + 4 + 0 + 626 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 672624225 + 48316401 = 25935^2 + 6951^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85036 + ... + 93128.

Almost surely, 2^720940626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720940626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917641062).

720940626 is an abundant number, since it is smaller than the sum of its proper divisors (1114341498).

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

720940626 is a wasteful number, since it uses less digits than its factorization.

720940626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8216 (or 8206 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 720940626 is about 26850.3375397778. The cubic root of 720940626 is about 896.6710874117.

The spelling of 720940626 in words is "seven hundred twenty million, nine hundred forty thousand, six hundred twenty-six".