781349112 has 64 divisors (see below), whose sum is σ = 2172729600. Its totient is φ = 260172000.

The previous prime is 781349089. The next prime is 781349119. The reversal of 781349112 is 211943187.

It is a happy number.

781349112 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 2×781349112² = 1221012869646377088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781349119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345987 + ... + 348237.

It is an arithmetic number, because the mean of its divisors is an integer number (33948900).

Almost surely, 2^781349112 is an apocalyptic number.

781349112 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

781349112 is an abundant number, since it is smaller than the sum of its proper divisors (1391380488).

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

781349112 is a wasteful number, since it uses less digits than its factorization.

781349112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873 (or 3863 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 781349112 is about 27952.6226318748. The cubic root of 781349112 is about 921.0468203977.

The spelling of 781349112 in words is "seven hundred eighty-one million, three hundred forty-nine thousand, one hundred twelve".