781972964 has 12 divisors (see below), whose sum is σ = 1368732288. Its totient is φ = 390906600.

The previous prime is 781972943. The next prime is 781972967. The reversal of 781972964 is 469279187.

It is a super-2 number, since 2×781972964² = 1222963432853890592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781972967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729 + ... + 39959.

It is an arithmetic number, because the mean of its divisors is an integer number (114061024).

Almost surely, 2^781972964 is an apocalyptic number.

It is an amenable number.

781972964 is a deficient number, since it is larger than the sum of its proper divisors (586759324).

781972964 is a wasteful number, since it uses less digits than its factorization.

781972964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39946 (or 39944 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 53.

The square root of 781972964 is about 27963.7795013478. The cubic root of 781972964 is about 921.2918854333.

The spelling of 781972964 in words is "seven hundred eighty-one million, nine hundred seventy-two thousand, nine hundred sixty-four".