16778112 has 64 divisors (see below), whose sum is σ = 48009360. Its totient is φ = 5160960.

The previous prime is 16778089. The next prime is 16778123. The reversal of 16778112 is 21187761.

It is a tau number, because it is divible by the number of its divisors (64).

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, 3312 + ... + 6672.

Almost surely, 2^16778112 is an apocalyptic number.

16778112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16778112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24004680).

16778112 is an abundant number, since it is smaller than the sum of its proper divisors (31231248).

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

16778112 is a wasteful number, since it uses less digits than its factorization.

16778112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391 (or 3379 counting only the distinct ones).

The product of its digits is 4704, while the sum is 33.

The square root of 16778112 is about 4096.1093735397. The cubic root of 16778112 is about 256.0045572105.

It can be divided in two parts, 16 and 778112, that added together give a triangular number (778128 = T₁₂₄₇).

The spelling of 16778112 in words is "sixteen million, seven hundred seventy-eight thousand, one hundred twelve".