2957643 has 24 divisors (see below), whose sum is σ = 4874688. Its totient is φ = 1711872.

The previous prime is 2957641. The next prime is 2957651. The reversal of 2957643 is 3467592.

2957643 is a `hidden beast` number, since 2 + 9 + 5 + 7 + 643 = 666.

It is not a de Polignac number, because 2957643 - 2¹ = 2957641 is a prime.

2957643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2957598 and 2957607.

It is not an unprimeable number, because it can be changed into a prime (2957641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1246 + ... + 2732.

It is an arithmetic number, because the mean of its divisors is an integer number (203112).

2^2957643 is an apocalyptic number.

2957643 is a deficient number, since it is larger than the sum of its proper divisors (1917045).

2957643 is a wasteful number, since it uses less digits than its factorization.

2957643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523 (or 1520 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2957643 is about 1719.7799277815. The cubic root of 2957643 is about 143.5429664909.

Adding to 2957643 its product of digits (45360), we get a palindrome (3003003).

It can be divided in two parts, 2957 and 643, that added together give a square (3600 = 60²).

The spelling of 2957643 in words is "two million, nine hundred fifty-seven thousand, six hundred forty-three".