209968026 has 32 divisors (see below), whose sum is σ = 425875968. Its totient is φ = 69006000.

The previous prime is 209968021. The next prime is 209968049. The reversal of 209968026 is 620869902.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (209968021) 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, 160491 + ... + 161793.

It is an arithmetic number, because the mean of its divisors is an integer number (13308624).

Almost surely, 2^209968026 is an apocalyptic number.

209968026 is an abundant number, since it is smaller than the sum of its proper divisors (215907942).

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

209968026 is a wasteful number, since it uses less digits than its factorization.

209968026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 209968026 is about 14490.2734963837. The cubic root of 209968026 is about 594.3620269260.

It can be divided in two parts, 2099 and 68026, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 209968026 in words is "two hundred nine million, nine hundred sixty-eight thousand, twenty-six".