2906806938 has 64 divisors (see below), whose sum is σ = 6882140160. Its totient is φ = 800839872.

The previous prime is 2906806937. The next prime is 2906806943. The reversal of 2906806938 is 8396086092.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2906806933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1854231 + ... + 1855797.

It is an arithmetic number, because the mean of its divisors is an integer number (107533440).

Almost surely, 2^2906806938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2906806938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3441070080).

2906806938 is an abundant number, since it is smaller than the sum of its proper divisors (3975333222).

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

2906806938 is a wasteful number, since it uses less digits than its factorization.

2906806938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 2906806938 is about 53914.8118609348. The cubic root of 2906806938 is about 1427.1580209774.

The spelling of 2906806938 in words is "two billion, nine hundred six million, eight hundred six thousand, nine hundred thirty-eight".