209994070 has 32 divisors (see below), whose sum is σ = 444074400. Its totient is φ = 70487040.

The previous prime is 209994007. The next prime is 209994077. The reversal of 209994070 is 70499902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209994077) 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, 71995 + ... + 74854.

It is an arithmetic number, because the mean of its divisors is an integer number (13877325).

Almost surely, 2^209994070 is an apocalyptic number.

209994070 is an abundant number, since it is smaller than the sum of its proper divisors (234080330).

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

209994070 is a wasteful number, since it uses less digits than its factorization.

209994070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146880.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 209994070 is about 14491.1721403067. The cubic root of 209994070 is about 594.3866003892.

It can be divided in two parts, 2099 and 94070, that added together give a palindrome (96169).

The spelling of 209994070 in words is "two hundred nine million, nine hundred ninety-four thousand, seventy".