781334442 has 24 divisors (see below), whose sum is σ = 1934733216. Its totient is φ = 223238376.

The previous prime is 781334423. The next prime is 781334453. The reversal of 781334442 is 244433187.

It is a super-2 number, since 2×781334442² = 1220967020510902728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781334397 and 781334406.

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, 3100408 + ... + 3100659.

It is an arithmetic number, because the mean of its divisors is an integer number (80613884).

Almost surely, 2^781334442 is an apocalyptic number.

781334442 is an abundant number, since it is smaller than the sum of its proper divisors (1153398774).

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

781334442 is a wasteful number, since it uses less digits than its factorization.

781334442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6201082 (or 6201079 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 781334442 is about 27952.3602223497. The cubic root of 781334442 is about 921.0410560767.

The spelling of 781334442 in words is "seven hundred eighty-one million, three hundred thirty-four thousand, four hundred forty-two".