781012056 has 32 divisors (see below), whose sum is σ = 2130033600. Its totient is φ = 236670240.

The previous prime is 781012033. The next prime is 781012103. The reversal of 781012056 is 650210187.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478926 + ... + 1479453.

It is an arithmetic number, because the mean of its divisors is an integer number (66563550).

Almost surely, 2^781012056 is an apocalyptic number.

It is an amenable number.

781012056 is an abundant number, since it is smaller than the sum of its proper divisors (1349021544).

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

781012056 is a wasteful number, since it uses less digits than its factorization.

781012056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958399 (or 2958395 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 781012056 is about 27946.5929229307. The cubic root of 781012056 is about 920.9143618921.

The spelling of 781012056 in words is "seven hundred eighty-one million, twelve thousand, fifty-six".