781030368 has 72 divisors (see below), whose sum is σ = 2292728256. Its totient is φ = 251942400.

The previous prime is 781030351. The next prime is 781030379. The reversal of 781030368 is 863030187.

781030368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×781030368² = 1220016871476430848, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34813 + ... + 52668.

It is an arithmetic number, because the mean of its divisors is an integer number (31843448).

Almost surely, 2^781030368 is an apocalyptic number.

It is an amenable number.

781030368 is an abundant number, since it is smaller than the sum of its proper divisors (1511697888).

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

781030368 is a wasteful number, since it uses less digits than its factorization.

781030368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87528 (or 87517 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 781030368 is about 27946.9205459206. The cubic root of 781030368 is about 920.9215592424.

The spelling of 781030368 in words is "seven hundred eighty-one million, thirty thousand, three hundred sixty-eight".