2729638 has 8 divisors (see below), whose sum is σ = 4205232. Its totient is φ = 1327896.

The previous prime is 2729633. The next prime is 2729651. The reversal of 2729638 is 8369272.

2729638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×2729638² = 14901847222088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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

It is a junction number, because it is equal to n+sod(n) for n = 2729597 and 2729606.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18370 + ... + 18517.

It is an arithmetic number, because the mean of its divisors is an integer number (525654).

2^2729638 is an apocalyptic number.

2729638 is a deficient number, since it is larger than the sum of its proper divisors (1475594).

2729638 is a wasteful number, since it uses less digits than its factorization.

2729638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36926.

The product of its digits is 36288, while the sum is 37.

The square root of 2729638 is about 1652.1616143707. The cubic root of 2729638 is about 139.7553209209.

The spelling of 2729638 in words is "two million, seven hundred twenty-nine thousand, six hundred thirty-eight".