3640071 has 4 divisors (see below), whose sum is σ = 4853432. Its totient is φ = 2426712.

The previous prime is 3640061. The next prime is 3640073. The reversal of 3640071 is 1700463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1700463 = 3 ⋅566821.

It is not a de Polignac number, because 3640071 - 2¹¹ = 3638023 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640073) 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, 606676 + ... + 606681.

It is an arithmetic number, because the mean of its divisors is an integer number (1213358).

Almost surely, 2^3640071 is an apocalyptic number.

3640071 is a deficient number, since it is larger than the sum of its proper divisors (1213361).

3640071 is a wasteful number, since it uses less digits than its factorization.

3640071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213360.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 3640071 is about 1907.8970097990. The cubic root of 3640071 is about 153.8284337732.

The spelling of 3640071 in words is "three million, six hundred forty thousand, seventy-one".