209244630 has 32 divisors (see below), whose sum is σ = 573928704. Its totient is φ = 47827296.

The previous prime is 209244613. The next prime is 209244631. The reversal of 209244630 is 36442902.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209244631) 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, 497992 + ... + 498411.

It is an arithmetic number, because the mean of its divisors is an integer number (17935272).

Almost surely, 2^209244630 is an apocalyptic number.

209244630 is an abundant number, since it is smaller than the sum of its proper divisors (364684074).

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

209244630 is a wasteful number, since it uses less digits than its factorization.

209244630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996420.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 209244630 is about 14465.2905259452. The cubic root of 209244630 is about 593.6786628237.

The spelling of 209244630 in words is "two hundred nine million, two hundred forty-four thousand, six hundred thirty".