216426738 has 16 divisors (see below), whose sum is σ = 472203936. Its totient is φ = 65583840.

The previous prime is 216426731. The next prime is 216426767. The reversal of 216426738 is 837624612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216426696 and 216426705.

It is not an unprimeable number, because it can be changed into a prime (216426731) 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, 1639531 + ... + 1639662.

It is an arithmetic number, because the mean of its divisors is an integer number (29512746).

Almost surely, 2^216426738 is an apocalyptic number.

216426738 is an abundant number, since it is smaller than the sum of its proper divisors (255777198).

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

216426738 is a wasteful number, since it uses less digits than its factorization.

216426738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279209.

The product of its digits is 96768, while the sum is 39.

The square root of 216426738 is about 14711.4492148123. The cubic root of 216426738 is about 600.3948678531.

The spelling of 216426738 in words is "two hundred sixteen million, four hundred twenty-six thousand, seven hundred thirty-eight".