216862870 has 64 divisors (see below), whose sum is σ = 464330880. Its totient is φ = 71350272.

The previous prime is 216862859. The next prime is 216862873. The reversal of 216862870 is 78268612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216862873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 643342 + ... + 643678.

It is an arithmetic number, because the mean of its divisors is an integer number (7255170).

Almost surely, 2^216862870 is an apocalyptic number.

216862870 is an abundant number, since it is smaller than the sum of its proper divisors (247468010).

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

216862870 is a wasteful number, since it uses less digits than its factorization.

216862870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 216862870 is about 14726.2646316030. The cubic root of 216862870 is about 600.7978921801.

The spelling of 216862870 in words is "two hundred sixteen million, eight hundred sixty-two thousand, eight hundred seventy".