216440970 has 32 divisors (see below), whose sum is σ = 546799680. Its totient is φ = 54679680.

The previous prime is 216440941. The next prime is 216440981. The reversal of 216440970 is 79044612.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189291 + ... + 190430.

It is an arithmetic number, because the mean of its divisors is an integer number (17087490).

Almost surely, 2^216440970 is an apocalyptic number.

216440970 is an abundant number, since it is smaller than the sum of its proper divisors (330358710).

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

216440970 is a wasteful number, since it uses less digits than its factorization.

216440970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379750.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 216440970 is about 14711.9329117557. The cubic root of 216440970 is about 600.4080280146.

It can be divided in two parts, 2164 and 40970, that added together give a palindrome (43134).

The spelling of 216440970 in words is "two hundred sixteen million, four hundred forty thousand, nine hundred seventy".