3640155 has 8 divisors (see below), whose sum is σ = 5824272. Its totient is φ = 1941408.

The previous prime is 3640151. The next prime is 3640163. The reversal of 3640155 is 5510463.

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

It is not a de Polignac number, because 3640155 - 2² = 3640151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3640151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121324 + ... + 121353.

It is an arithmetic number, because the mean of its divisors is an integer number (728034).

Almost surely, 2^3640155 is an apocalyptic number.

3640155 is a deficient number, since it is larger than the sum of its proper divisors (2184117).

3640155 is a wasteful number, since it uses less digits than its factorization.

3640155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242685.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 3640155 is about 1907.9190234389. The cubic root of 3640155 is about 153.8296170366.

The spelling of 3640155 in words is "three million, six hundred forty thousand, one hundred fifty-five".