781484316 has 12 divisors (see below), whose sum is σ = 1823463432. Its totient is φ = 260494768.

The previous prime is 781484309. The next prime is 781484387. The reversal of 781484316 is 613484187.

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

It is a super-2 number, since 2×781484316² = 1221435472307975712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32561835 + ... + 32561858.

It is an arithmetic number, because the mean of its divisors is an integer number (151955286).

Almost surely, 2^781484316 is an apocalyptic number.

It is an amenable number.

781484316 is an abundant number, since it is smaller than the sum of its proper divisors (1041979116).

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

781484316 is a wasteful number, since it uses less digits than its factorization.

781484316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65123700 (or 65123698 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 781484316 is about 27955.0409765395. The cubic root of 781484316 is about 921.0999430588.

The spelling of 781484316 in words is "seven hundred eighty-one million, four hundred eighty-four thousand, three hundred sixteen".