216334470 has 32 divisors (see below), whose sum is σ = 566403840. Its totient is φ = 52444640.

The previous prime is 216334451. The next prime is 216334471. The reversal of 216334470 is 74433612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216334471) 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, 327450 + ... + 328109.

It is an arithmetic number, because the mean of its divisors is an integer number (17700120).

Almost surely, 2^216334470 is an apocalyptic number.

216334470 is an abundant number, since it is smaller than the sum of its proper divisors (350069370).

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

216334470 is a wasteful number, since it uses less digits than its factorization.

216334470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655580.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 216334470 is about 14708.3129556044. The cubic root of 216334470 is about 600.3095347307.

The spelling of 216334470 in words is "two hundred sixteen million, three hundred thirty-four thousand, four hundred seventy".