3840155 has 8 divisors (see below), whose sum is σ = 5027184. Its totient is φ = 2792800.

The previous prime is 3840139. The next prime is 3840157. The reversal of 3840155 is 5510483.

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

It is not a de Polignac number, because 3840155 - 2⁴ = 3840139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3840157) 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, 34856 + ... + 34965.

It is an arithmetic number, because the mean of its divisors is an integer number (628398).

Almost surely, 2^3840155 is an apocalyptic number.

3840155 is a deficient number, since it is larger than the sum of its proper divisors (1187029).

3840155 is a wasteful number, since it uses less digits than its factorization.

3840155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69837.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 3840155 is about 1959.6313428806. The cubic root of 3840155 is about 156.5968125784.

The spelling of 3840155 in words is "three million, eight hundred forty thousand, one hundred fifty-five".