2729405 has 8 divisors (see below), whose sum is σ = 3743232. Its totient is φ = 1871568.

The previous prime is 2729383. The next prime is 2729413. The reversal of 2729405 is 5049272.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2729405 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 38957 + ... + 39026.

It is an arithmetic number, because the mean of its divisors is an integer number (467904).

2^2729405 is an apocalyptic number.

It is an amenable number.

2729405 is a deficient number, since it is larger than the sum of its proper divisors (1013827).

2729405 is an equidigital number, since it uses as much as digits as its factorization.

2729405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77995.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 2729405 is about 1652.0910991831. The cubic root of 2729405 is about 139.7513443355.

The spelling of 2729405 in words is "two million, seven hundred twenty-nine thousand, four hundred five".