16788438 has 32 divisors (see below), whose sum is σ = 39273600. Its totient is φ = 5301288.

The previous prime is 16788437. The next prime is 16788451. The reversal of 16788438 is 83488761.

It is a junction number, because it is equal to n+sod(n) for n = 16788393 and 16788402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16788433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7156 + ... + 9207.

It is an arithmetic number, because the mean of its divisors is an integer number (1227300).

Almost surely, 2^16788438 is an apocalyptic number.

16788438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16788438 is an abundant number, since it is smaller than the sum of its proper divisors (22485162).

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

16788438 is a wasteful number, since it uses less digits than its factorization.

16788438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16393 (or 16387 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 16788438 is about 4097.3696440521. The cubic root of 16788438 is about 256.0570653222.

The spelling of 16788438 in words is "sixteen million, seven hundred eighty-eight thousand, four hundred thirty-eight".