773921916 has 18 divisors (see below), whose sum is σ = 1956302712. Its totient is φ = 257973960.

The previous prime is 773921903. The next prime is 773921977. The reversal of 773921916 is 619129377.

773921916 is a `hidden beast` number, since 77 + 392 + 191 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×773921916² = 1197910264130222112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) 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 5 ways as a sum of consecutive naturals, for example, 10748880 + ... + 10748951.

It is an arithmetic number, because the mean of its divisors is an integer number (108683484).

Almost surely, 2^773921916 is an apocalyptic number.

It is an amenable number.

773921916 is an abundant number, since it is smaller than the sum of its proper divisors (1182380796).

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

773921916 is a wasteful number, since it uses less digits than its factorization.

773921916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21497841 (or 21497836 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 773921916 is about 27819.4521153814. The cubic root of 773921916 is about 918.1191552225.

The spelling of 773921916 in words is "seven hundred seventy-three million, nine hundred twenty-one thousand, nine hundred sixteen".