720436838 has 32 divisors (see below), whose sum is σ = 1229091840. Its totient is φ = 313740000.

The previous prime is 720436819. The next prime is 720436853. The reversal of 720436838 is 838634027.

It is a junction number, because it is equal to n+sod(n) for n = 720436795 and 720436804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63653 + ... + 74111.

It is an arithmetic number, because the mean of its divisors is an integer number (38409120).

Almost surely, 2^720436838 is an apocalyptic number.

720436838 is a deficient number, since it is larger than the sum of its proper divisors (508655002).

720436838 is a wasteful number, since it uses less digits than its factorization.

720436838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10604.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 720436838 is about 26840.9544912248. The cubic root of 720436838 is about 896.4621763583.

The spelling of 720436838 in words is "seven hundred twenty million, four hundred thirty-six thousand, eight hundred thirty-eight".