2640528 has 60 divisors (see below), whose sum is σ = 8066448. Its totient is φ = 799680.

The previous prime is 2640527. The next prime is 2640551. The reversal of 2640528 is 8250462.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2640527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751 + ... + 2417.

2^2640528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4033224).

2640528 is an abundant number, since it is smaller than the sum of its proper divisors (5425920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2640528 is a wasteful number, since it uses less digits than its factorization.

2640528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692 (or 1683 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2640528 is about 1624.9701535721. The cubic root of 2640528 is about 138.2176778837.

The spelling of 2640528 in words is "two million, six hundred forty thousand, five hundred twenty-eight".