781360704 has 84 divisors (see below), whose sum is σ = 2311928320. Its totient is φ = 252046080.

The previous prime is 781360691. The next prime is 781360721. The reversal of 781360704 is 407063187.

It is a super-2 number, since 2×781360704² = 1221049099510751232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4024 + ... + 39735.

Almost surely, 2^781360704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781360704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155964160).

781360704 is an abundant number, since it is smaller than the sum of its proper divisors (1530567616).

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

781360704 is a wasteful number, since it uses less digits than its factorization.

781360704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43808 (or 43795 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 781360704 is about 27952.8299819535. The cubic root of 781360704 is about 921.0513752213.

The spelling of 781360704 in words is "seven hundred eighty-one million, three hundred sixty thousand, seven hundred four".