2009291638 has 16 divisors (see below), whose sum is σ = 3169751040. Its totient is φ = 953396136.

The previous prime is 2009291611. The next prime is 2009291681. The reversal of 2009291638 is 8361929002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009291638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166128 + ... + 177811.

It is an arithmetic number, because the mean of its divisors is an integer number (198109440).

Almost surely, 2^2009291638 is an apocalyptic number.

2009291638 is a deficient number, since it is larger than the sum of its proper divisors (1160459402).

2009291638 is a wasteful number, since it uses less digits than its factorization.

2009291638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344091.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2009291638 is about 44825.1228442265. The cubic root of 2009291638 is about 1261.8691578673.

The spelling of 2009291638 in words is "two billion, nine million, two hundred ninety-one thousand, six hundred thirty-eight".