16406238 has 16 divisors (see below), whose sum is σ = 33138576. Its totient is φ = 5414400.

The previous prime is 16406237. The next prime is 16406249. The reversal of 16406238 is 83260461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12931 + ... + 14142.

It is an arithmetic number, because the mean of its divisors is an integer number (2071161).

Almost surely, 2^16406238 is an apocalyptic number.

16406238 is an abundant number, since it is smaller than the sum of its proper divisors (16732338).

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

16406238 is a wasteful number, since it uses less digits than its factorization.

16406238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27179.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 16406238 is about 4050.4614551925. The cubic root of 16406238 is about 254.0990272519.

Adding to 16406238 its reverse (83260461), we get a palindrome (99666699).

The spelling of 16406238 in words is "sixteen million, four hundred six thousand, two hundred thirty-eight".