2729438 has 4 divisors (see below), whose sum is σ = 4094160. Its totient is φ = 1364718.

The previous prime is 2729437. The next prime is 2729443. The reversal of 2729438 is 8349272.

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

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2729398 and 2729407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 682358 + ... + 682361.

It is an arithmetic number, because the mean of its divisors is an integer number (1023540).

2^2729438 is an apocalyptic number.

2729438 is a deficient number, since it is larger than the sum of its proper divisors (1364722).

2729438 is a wasteful number, since it uses less digits than its factorization.

2729438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364721.

The product of its digits is 24192, while the sum is 35.

The square root of 2729438 is about 1652.1010864956. The cubic root of 2729438 is about 139.7519075566.

The spelling of 2729438 in words is "two million, seven hundred twenty-nine thousand, four hundred thirty-eight".