2640735 has 32 divisors (see below), whose sum is σ = 4853760. Its totient is φ = 1360800.

The previous prime is 2640721. The next prime is 2640739. The reversal of 2640735 is 5370462.

It is a happy number.

It is not a de Polignac number, because 2640735 - 2¹⁰ = 2639711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 2640699 and 2640708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3870 + ... + 4500.

It is an arithmetic number, because the mean of its divisors is an integer number (151680).

2^2640735 is an apocalyptic number.

2640735 is a deficient number, since it is larger than the sum of its proper divisors (2213025).

2640735 is a wasteful number, since it uses less digits than its factorization.

2640735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 2640735 is about 1625.0338458014. The cubic root of 2640735 is about 138.2212895744.

It can be divided in two parts, 2640 and 735, that added together give a cube (3375 = 15³).

The spelling of 2640735 in words is "two million, six hundred forty thousand, seven hundred thirty-five".