720402836 has 12 divisors (see below), whose sum is σ = 1277975412. Its totient is φ = 355267008.

The previous prime is 720402811. The next prime is 720402857. The reversal of 720402836 is 638204027.

720402836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 325585936 + 394816900 = 18044^2 + 19870^2 .

It is a super-2 number, since 2×720402836² = 1037960492233685792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233275 + ... + 1233858.

It is an arithmetic number, because the mean of its divisors is an integer number (106497951).

Almost surely, 2^720402836 is an apocalyptic number.

It is an amenable number.

720402836 is a deficient number, since it is larger than the sum of its proper divisors (557572576).

720402836 is a wasteful number, since it uses less digits than its factorization.

720402836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467210 (or 2467208 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 720402836 is about 26840.3210860079. The cubic root of 720402836 is about 896.4480728843.

The spelling of 720402836 in words is "seven hundred twenty million, four hundred two thousand, eight hundred thirty-six".