216439374 has 16 divisors (see below), whose sum is σ = 455662080. Its totient is φ = 68349240.

The previous prime is 216439373. The next prime is 216439397. The reversal of 216439374 is 473934612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216439373) 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, 949182 + ... + 949409.

It is an arithmetic number, because the mean of its divisors is an integer number (28478880).

Almost surely, 2^216439374 is an apocalyptic number.

216439374 is an abundant number, since it is smaller than the sum of its proper divisors (239222706).

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

216439374 is a wasteful number, since it uses less digits than its factorization.

216439374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898615.

The product of its digits is 108864, while the sum is 39.

The square root of 216439374 is about 14711.8786699728. The cubic root of 216439374 is about 600.4065522410.

The spelling of 216439374 in words is "two hundred sixteen million, four hundred thirty-nine thousand, three hundred seventy-four".