3645739 has 6 divisors (see below), whose sum is σ = 3848100. Its totient is φ = 3453516.

The previous prime is 3645737. The next prime is 3645749. The reversal of 3645739 is 9375463.

3645739 = 777² + 778² + ... + 782².

It is not a de Polignac number, because 3645739 - 2¹ = 3645737 is a prime.

It is a super-2 number, since 2×3645739² = 26582825712242, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹¹ + 6⁴ + 4¹⁰ + 5³ + 7⁷ + 3¹³ + 9³ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3645698 and 3645707.

It is not an unprimeable number, because it can be changed into a prime (3645731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4689 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (641350).

Almost surely, 2^3645739 is an apocalyptic number.

3645739 is a deficient number, since it is larger than the sum of its proper divisors (202361).

3645739 is a wasteful number, since it uses less digits than its factorization.

3645739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10137 (or 10118 counting only the distinct ones).

The product of its digits is 68040, while the sum is 37.

The square root of 3645739 is about 1909.3818371400. The cubic root of 3645739 is about 153.9082350925.

The spelling of 3645739 in words is "three million, six hundred forty-five thousand, seven hundred thirty-nine".