2909938 has 4 divisors (see below), whose sum is σ = 4364910. Its totient is φ = 1454968.

The previous prime is 2909923. The next prime is 2909957. The reversal of 2909938 is 8399092.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2199289 + 710649 = 1483^2 + 843^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2909938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727483 + ... + 727486.

2^2909938 is an apocalyptic number.

2909938 is a deficient number, since it is larger than the sum of its proper divisors (1454972).

2909938 is a wasteful number, since it uses less digits than its factorization.

2909938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454971.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 2909938 is about 1705.8540383046. The cubic root of 2909938 is about 142.7670257357.

The spelling of 2909938 in words is "two million, nine hundred nine thousand, nine hundred thirty-eight".