2909398 has 4 divisors (see below), whose sum is σ = 4364100. Its totient is φ = 1454698.

The previous prime is 2909393. The next prime is 2909407. The reversal of 2909398 is 8939092.

It is a happy number.

2909398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 2909398.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2909393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727348 + ... + 727351.

It is an arithmetic number, because the mean of its divisors is an integer number (1091025).

2^2909398 is an apocalyptic number.

2909398 is a deficient number, since it is larger than the sum of its proper divisors (1454702).

2909398 is a wasteful number, since it uses less digits than its factorization.

2909398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454701.

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

The square root of 2909398 is about 1705.6957524717. The cubic root of 2909398 is about 142.7581940512.

The spelling of 2909398 in words is "two million, nine hundred nine thousand, three hundred ninety-eight".