206169964 has 144 divisors (see below), whose sum is σ = 507179008. Its totient is φ = 71280000.

The previous prime is 206169923. The next prime is 206169973. The reversal of 206169964 is 469961602.

It is a happy number.

It is a super-2 number, since 2×206169964² = 85012108111522592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206169964.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1365289 + ... + 1365439.

Almost surely, 2^206169964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206169964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253589504).

206169964 is an abundant number, since it is smaller than the sum of its proper divisors (301009044).

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

206169964 is a wasteful number, since it uses less digits than its factorization.

206169964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 206169964 is about 14358.6198501109. The cubic root of 206169964 is about 590.7564404571.

The spelling of 206169964 in words is "two hundred six million, one hundred sixty-nine thousand, nine hundred sixty-four".