3643955 has 8 divisors (see below), whose sum is σ = 4997472. Its totient is φ = 2498688.

The previous prime is 3643951. The next prime is 3643961. The reversal of 3643955 is 5593463.

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

It is a cyclic number.

It is not a de Polignac number, because 3643955 - 2² = 3643951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 104113 = 3643955 / (3 + 6 + 4 + 3 + 9 + 5 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52022 + ... + 52091.

It is an arithmetic number, because the mean of its divisors is an integer number (624684).

Almost surely, 2^3643955 is an apocalyptic number.

3643955 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3643955 is a deficient number, since it is larger than the sum of its proper divisors (1353517).

3643955 is a wasteful number, since it uses less digits than its factorization.

3643955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104125.

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

The square root of 3643955 is about 1908.9146130720. The cubic root of 3643955 is about 153.8831265947.

The spelling of 3643955 in words is "three million, six hundred forty-three thousand, nine hundred fifty-five".