781848042 has 16 divisors (see below), whose sum is σ = 1567231200. Its totient is φ = 260026832.

The previous prime is 781848019. The next prime is 781848047. The reversal of 781848042 is 240848187.

It is a super-2 number, since 2×781848042² = 1222572721558467528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 781847985 and 781848003.

It is not an unprimeable number, because it can be changed into a prime (781848047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144417 + ... + 149732.

It is an arithmetic number, because the mean of its divisors is an integer number (97951950).

Almost surely, 2^781848042 is an apocalyptic number.

781848042 is an abundant number, since it is smaller than the sum of its proper divisors (785383158).

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

781848042 is a wasteful number, since it uses less digits than its factorization.

781848042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294597.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 781848042 is about 27961.5457727215. The cubic root of 781848042 is about 921.2428233134.

The spelling of 781848042 in words is "seven hundred eighty-one million, eight hundred forty-eight thousand, forty-two".