16778934 has 16 divisors (see below), whose sum is σ = 37286640. Its totient is φ = 5592960.

The previous prime is 16778929. The next prime is 16778947. The reversal of 16778934 is 43987761.

It is a self number, because there is not a number n which added to its sum of digits gives 16778934.

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, 155307 + ... + 155414.

It is an arithmetic number, because the mean of its divisors is an integer number (2330415).

Almost surely, 2^16778934 is an apocalyptic number.

16778934 is an abundant number, since it is smaller than the sum of its proper divisors (20507706).

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

16778934 is a wasteful number, since it uses less digits than its factorization.

16778934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310732 (or 310726 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 16778934 is about 4096.2097114284. The cubic root of 16778934 is about 256.0087379016.

The spelling of 16778934 in words is "sixteen million, seven hundred seventy-eight thousand, nine hundred thirty-four".