2640712 has 16 divisors (see below), whose sum is σ = 5242860. Its totient is φ = 1242624.

The previous prime is 2640709. The next prime is 2640713. The reversal of 2640712 is 2170462.

It can be written as a sum of positive squares in 2 ways, for example, as 2515396 + 125316 = 1586^2 + 354^2 .

It is not an unprimeable number, because it can be changed into a prime (2640713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9573 + ... + 9844.

2^2640712 is an apocalyptic number.

It is an amenable number.

2640712 is a deficient number, since it is larger than the sum of its proper divisors (2602148).

2640712 is a wasteful number, since it uses less digits than its factorization.

2640712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19440 (or 19436 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2640712 is about 1625.0267690103. The cubic root of 2640712 is about 138.2208882848.

It can be divided in two parts, 2 and 640712, that multiplied together give a square (1281424 = 1132²).

The spelling of 2640712 in words is "two million, six hundred forty thousand, seven hundred twelve".