781680092 has 24 divisors (see below), whose sum is σ = 1376854080. Its totient is φ = 388301760.

The previous prime is 781680059. The next prime is 781680113. The reversal of 781680092 is 290086187.

It is a super-2 number, since 2×781680092² = 1222047532458256928, which contains 22 as substring.

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, 631298 + ... + 632534.

It is an arithmetic number, because the mean of its divisors is an integer number (57368920).

Almost surely, 2^781680092 is an apocalyptic number.

It is an amenable number.

781680092 is a deficient number, since it is larger than the sum of its proper divisors (595173988).

781680092 is a wasteful number, since it uses less digits than its factorization.

781680092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 781680092 is about 27958.5423797450. The cubic root of 781680092 is about 921.1768540525.

The spelling of 781680092 in words is "seven hundred eighty-one million, six hundred eighty thousand, ninety-two".