3640719 has 4 divisors (see below), whose sum is σ = 4854296. Its totient is φ = 2427144.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640719 is 9170463.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3640719 - 2¹ = 3640717 is a prime.

It is a super-2 number, since 2×3640719² = 26509669673922, which contains 22 as substring.

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 (3640711) 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, 606784 + ... + 606789.

It is an arithmetic number, because the mean of its divisors is an integer number (1213574).

Almost surely, 2^3640719 is an apocalyptic number.

3640719 is a deficient number, since it is larger than the sum of its proper divisors (1213577).

3640719 is a wasteful number, since it uses less digits than its factorization.

3640719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213576.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 3640719 is about 1908.0668227292. The cubic root of 3640719 is about 153.8375613342.

It can be divided in two parts, 36 and 40719, that added together give a triangular number (40755 = T₂₈₅).

The spelling of 3640719 in words is "three million, six hundred forty thousand, seven hundred nineteen".