2009967538 has 8 divisors (see below), whose sum is σ = 3015165420. Its totient is φ = 1004912400.

The previous prime is 2009967517. The next prime is 2009967571. The reversal of 2009967538 is 8357699002.

It can be written as a sum of positive squares in 2 ways, for example, as 1879482609 + 130484929 = 43353^2 + 11423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2009967491 and 2009967500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12568 + ... + 64636.

Almost surely, 2^2009967538 is an apocalyptic number.

2009967538 is a deficient number, since it is larger than the sum of its proper divisors (1005197882).

2009967538 is a wasteful number, since it uses less digits than its factorization.

2009967538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71372.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 2009967538 is about 44832.6615092167. The cubic root of 2009967538 is about 1262.0106342183.

The spelling of 2009967538 in words is "two billion, nine million, nine hundred sixty-seven thousand, five hundred thirty-eight".