2640746 has 16 divisors (see below), whose sum is σ = 4241160. Its totient is φ = 1228800.

The previous prime is 2640739. The next prime is 2640749. The reversal of 2640746 is 6470462.

2640746 = T₂₄₄ + T₂₄₅ + ... + T₃₁₁.

It can be written as a sum of positive squares in 4 ways, for example, as 2640625 + 121 = 1625^2 + 11^2 .

It is not an unprimeable number, because it can be changed into a prime (2640749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3050 + ... + 3818.

2^2640746 is an apocalyptic number.

2640746 is a deficient number, since it is larger than the sum of its proper divisors (1600414).

2640746 is a wasteful number, since it uses less digits than its factorization.

2640746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 2640746 is about 1625.0372303427. The cubic root of 2640746 is about 138.2214814947.

The spelling of 2640746 in words is "two million, six hundred forty thousand, seven hundred forty-six".