3953645 has 8 divisors (see below), whose sum is σ = 4791960. Its totient is φ = 3131200.

The previous prime is 3953629. The next prime is 3953669. The reversal of 3953645 is 5463593.

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 3334276 = 787^2 + 1826^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3953645 - 2⁴ = 3953629 is a prime.

It is a super-3 number, since 3×3953645³ (a number of 21 digits) contains 333 as substring.

It is a d-powerful number, because it can be written as 3 + 9³ + 5⁹ + 3 + 6⁶ + 4 + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3410 + ... + 4419.

It is an arithmetic number, because the mean of its divisors is an integer number (598995).

Almost surely, 2^3953645 is an apocalyptic number.

It is an amenable number.

3953645 is a deficient number, since it is larger than the sum of its proper divisors (838315).

3953645 is a wasteful number, since it uses less digits than its factorization.

3953645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7935.

The product of its digits is 48600, while the sum is 35.

The square root of 3953645 is about 1988.3774792529. The cubic root of 3953645 is about 158.1245212898.

The spelling of 3953645 in words is "three million, nine hundred fifty-three thousand, six hundred forty-five".