2729639 has 12 divisors (see below), whose sum is σ = 3179232. Its totient is φ = 2333760.

The previous prime is 2729633. The next prime is 2729651. The reversal of 2729639 is 9369272.

It is not a de Polignac number, because 2729639 - 2⁸ = 2729383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1394 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (264936).

2^2729639 is an apocalyptic number.

2729639 is a deficient number, since it is larger than the sum of its proper divisors (449593).

2729639 is a wasteful number, since it uses less digits than its factorization.

2729639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1355 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 2729639 is about 1652.1619170045. The cubic root of 2729639 is about 139.7553379873.

The spelling of 2729639 in words is "two million, seven hundred twenty-nine thousand, six hundred thirty-nine".