720263778 has 32 divisors (see below), whose sum is σ = 1604836800. Its totient is φ = 213976896.

The previous prime is 720263741. The next prime is 720263801. The reversal of 720263778 is 877362027.

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, 156948 + ... + 161471.

It is an arithmetic number, because the mean of its divisors is an integer number (50151150).

Almost surely, 2^720263778 is an apocalyptic number.

720263778 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

720263778 is an abundant number, since it is smaller than the sum of its proper divisors (884573022).

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

720263778 is a wasteful number, since it uses less digits than its factorization.

720263778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318466.

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 720263778 is about 26837.7304927224. The cubic root of 720263778 is about 896.3903892794.

The spelling of 720263778 in words is "seven hundred twenty million, two hundred sixty-three thousand, seven hundred seventy-eight".