2640536 has 8 divisors (see below), whose sum is σ = 4951020. Its totient is φ = 1320264.

The previous prime is 2640527. The next prime is 2640551. The reversal of 2640536 is 6350462.

It is a tau number, because it is divible by the number of its divisors (8).

It is a d-powerful number, because it can be written as 2²¹ + 6⁴ + 4⁹ + 0 + 5 + 3 + 6⁷ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165026 + ... + 165041.

2^2640536 is an apocalyptic number.

It is an amenable number.

2640536 is a deficient number, since it is larger than the sum of its proper divisors (2310484).

2640536 is a wasteful number, since it uses less digits than its factorization.

2640536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330073 (or 330069 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2640536 is about 1624.9726151539. The cubic root of 2640536 is about 138.2178174694.

Adding to 2640536 its reverse (6350462), we get a palindrome (8990998).

The spelling of 2640536 in words is "two million, six hundred forty thousand, five hundred thirty-six".