781368492 has 12 divisors (see below), whose sum is σ = 1823193176. Its totient is φ = 260456160.

The previous prime is 781368491. The next prime is 781368503. The reversal of 781368492 is 294863187.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×781368492² = 1221073440580708128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781368491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32557009 + ... + 32557032.

Almost surely, 2^781368492 is an apocalyptic number.

It is an amenable number.

781368492 is an abundant number, since it is smaller than the sum of its proper divisors (1041824684).

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

781368492 is a wasteful number, since it uses less digits than its factorization.

781368492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65114048 (or 65114046 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 781368492 is about 27952.9692877161. The cubic root of 781368492 is about 921.0544353207.

The spelling of 781368492 in words is "seven hundred eighty-one million, three hundred sixty-eight thousand, four hundred ninety-two".