2209961436 has 72 divisors (see below), whose sum is σ = 5369075712. Its totient is φ = 707112000.

The previous prime is 2209961431. The next prime is 2209961437. The reversal of 2209961436 is 6341699022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209961431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1919461 + ... + 1920611.

It is an arithmetic number, because the mean of its divisors is an integer number (74570496).

Almost surely, 2^2209961436 is an apocalyptic number.

It is an amenable number.

2209961436 is an abundant number, since it is smaller than the sum of its proper divisors (3159114276).

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

2209961436 is a wasteful number, since it uses less digits than its factorization.

2209961436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323 (or 1260 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 2209961436 is about 47010.2269298926. The cubic root of 2209961436 is about 1302.5514852248.

The spelling of 2209961436 in words is "two billion, two hundred nine million, nine hundred sixty-one thousand, four hundred thirty-six".