781887348 has 72 divisors (see below), whose sum is σ = 2161295136. Its totient is φ = 236366400.

The previous prime is 781887329. The next prime is 781887377. The reversal of 781887348 is 843788187.

It is a super-2 number, since 2×781887348² = 1222695649924946208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781887294 and 781887303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180415 + ... + 184697.

It is an arithmetic number, because the mean of its divisors is an integer number (30017988).

Almost surely, 2^781887348 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 781887348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080647568).

781887348 is an abundant number, since it is smaller than the sum of its proper divisors (1379407788).

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

781887348 is a wasteful number, since it uses less digits than its factorization.

781887348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765 (or 4760 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 781887348 is about 27962.2486220261. The cubic root of 781887348 is about 921.2582609951.

The spelling of 781887348 in words is "seven hundred eighty-one million, eight hundred eighty-seven thousand, three hundred forty-eight".