2738643 has 8 divisors (see below), whose sum is σ = 3729408. Its totient is φ = 1786824.

The previous prime is 2738639. The next prime is 2738647. The reversal of 2738643 is 3468372.

It is an interprime number because it is at equal distance from previous prime (2738639) and next prime (2738647).

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

It is not a de Polignac number, because 2738643 - 2² = 2738639 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 3⁷ + 8³ + 6⁸ + 4⁴ + 3¹² .

2738643 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2738647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9571 + ... + 9852.

It is an arithmetic number, because the mean of its divisors is an integer number (466176).

2^2738643 is an apocalyptic number.

2738643 is a deficient number, since it is larger than the sum of its proper divisors (990765).

2738643 is a wasteful number, since it uses less digits than its factorization.

2738643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19473.

The product of its digits is 24192, while the sum is 33.

The square root of 2738643 is about 1654.8845881209. The cubic root of 2738643 is about 139.9088352063.

The spelling of 2738643 in words is "two million, seven hundred thirty-eight thousand, six hundred forty-three".