781349396 has 12 divisors (see below), whose sum is σ = 1367688000. Its totient is φ = 390581400.

The previous prime is 781349383. The next prime is 781349411. The reversal of 781349396 is 693943187.

It is a super-2 number, since 2×781349396² = 1221013757259129632, which contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2396 + ... + 39603.

It is an arithmetic number, because the mean of its divisors is an integer number (113974000).

Almost surely, 2^781349396 is an apocalyptic number.

It is an amenable number.

781349396 is a deficient number, since it is larger than the sum of its proper divisors (586338604).

781349396 is a wasteful number, since it uses less digits than its factorization.

781349396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46654 (or 46652 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 781349396 is about 27952.6277118986. The cubic root of 781349396 is about 921.0469319899.

The spelling of 781349396 in words is "seven hundred eighty-one million, three hundred forty-nine thousand, three hundred ninety-six".