2528643 has 16 divisors (see below), whose sum is σ = 3790080. Its totient is φ = 1487904.

The previous prime is 2528629. The next prime is 2528651. The reversal of 2528643 is 3468252.

It is not a de Polignac number, because 2528643 - 2⁴ = 2528627 is a prime.

2528643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2528643.

It is not an unprimeable number, because it can be changed into a prime (2528663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (236880).

2^2528643 is an apocalyptic number.

2528643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2528643 is a deficient number, since it is larger than the sum of its proper divisors (1261437).

2528643 is a wasteful number, since it uses less digits than its factorization.

2528643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858.

The product of its digits is 11520, while the sum is 30.

The square root of 2528643 is about 1590.1707455490. The cubic root of 2528643 is about 136.2372409004.

The spelling of 2528643 in words is "two million, five hundred twenty-eight thousand, six hundred forty-three".