16778334 has 16 divisors (see below), whose sum is σ = 33597072. Its totient is φ = 5586048.

The previous prime is 16778309. The next prime is 16778357. The reversal of 16778334 is 43387761.

It is a junction number, because it is equal to n+sod(n) for n = 16778292 and 16778301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8022 + ... + 9894.

It is an arithmetic number, because the mean of its divisors is an integer number (2099817).

Almost surely, 2^16778334 is an apocalyptic number.

16778334 is an abundant number, since it is smaller than the sum of its proper divisors (16818738).

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

16778334 is a wasteful number, since it uses less digits than its factorization.

16778334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371.

The product of its digits is 84672, while the sum is 39.

The square root of 16778334 is about 4096.1364723359. The cubic root of 16778334 is about 256.0056863158.

It can be divided in two parts, 1677 and 8334, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 16778334 in words is "sixteen million, seven hundred seventy-eight thousand, three hundred thirty-four".