781342938 has 24 divisors (see below), whose sum is σ = 1732281408. Its totient is φ = 254390472.

The previous prime is 781342931. The next prime is 781342957. The reversal of 781342938 is 839243187.

781342938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×781342938² = 1220993573524943688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781342893 and 781342902.

It is not an unprimeable number, because it can be changed into a prime (781342931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503970 + ... + 505517.

It is an arithmetic number, because the mean of its divisors is an integer number (72178392).

Almost surely, 2^781342938 is an apocalyptic number.

781342938 is an abundant number, since it is smaller than the sum of its proper divisors (950938470).

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

781342938 is a wasteful number, since it uses less digits than its factorization.

781342938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009538 (or 1009535 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 781342938 is about 27952.5121947921. The cubic root of 781342938 is about 921.0443944407.

The spelling of 781342938 in words is "seven hundred eighty-one million, three hundred forty-two thousand, nine hundred thirty-eight".