216034638 has 16 divisors (see below), whose sum is σ = 443747280. Its totient is φ = 70065216.

The previous prime is 216034631. The next prime is 216034639. The reversal of 216034638 is 836430612.

216034638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216034599 and 216034608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216034631) 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, 486343 + ... + 486786.

It is an arithmetic number, because the mean of its divisors is an integer number (27734205).

Almost surely, 2^216034638 is an apocalyptic number.

216034638 is an abundant number, since it is smaller than the sum of its proper divisors (227712642).

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

216034638 is a wasteful number, since it uses less digits than its factorization.

216034638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973171.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 216034638 is about 14698.1168181505. The cubic root of 216034638 is about 600.0320705080.

The spelling of 216034638 in words is "two hundred sixteen million, thirty-four thousand, six hundred thirty-eight".