780812872 has 64 divisors (see below), whose sum is σ = 1748275200. Its totient is φ = 319878720.

The previous prime is 780812867. The next prime is 780812881. The reversal of 780812872 is 278218087.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141379 + ... + 146797.

It is an arithmetic number, because the mean of its divisors is an integer number (27316800).

Almost surely, 2^780812872 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 780812872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874137600).

780812872 is an abundant number, since it is smaller than the sum of its proper divisors (967462328).

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

780812872 is a wasteful number, since it uses less digits than its factorization.

780812872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5546 (or 5542 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 780812872 is about 27943.0290412475. The cubic root of 780812872 is about 920.8360673251.

The spelling of 780812872 in words is "seven hundred eighty million, eight hundred twelve thousand, eight hundred seventy-two".