216860070 has 128 divisors (see below), whose sum is σ = 618347520. Its totient is φ = 47646720.

The previous prime is 216860027. The next prime is 216860089. The reversal of 216860070 is 70068612.

It is a happy number.

216860070 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 766149 + ... + 766431.

It is an arithmetic number, because the mean of its divisors is an integer number (4830840).

Almost surely, 2^216860070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216860070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309173760).

216860070 is an abundant number, since it is smaller than the sum of its proper divisors (401487450).

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

216860070 is a wasteful number, since it uses less digits than its factorization.

216860070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 216860070 is about 14726.1695630602. The cubic root of 216860070 is about 600.7953064581.

The spelling of 216860070 in words is "two hundred sixteen million, eight hundred sixty thousand, seventy".