3949155 has 60 divisors (see below), whose sum is σ = 8276400. Its totient is φ = 1796256.

The previous prime is 3949147. The next prime is 3949157. The reversal of 3949155 is 5519493.

It is not a de Polignac number, because 3949155 - 2³ = 3949147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949157) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 19746 + ... + 19944.

It is an arithmetic number, because the mean of its divisors is an integer number (137940).

Almost surely, 2^3949155 is an apocalyptic number.

3949155 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3949155 is an abundant number, since it is smaller than the sum of its proper divisors (4327245).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3949155 is a wasteful number, since it uses less digits than its factorization.

3949155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 214 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 3949155 is about 1987.2480972440. The cubic root of 3949155 is about 158.0646400043.

It can be divided in two parts, 39 and 49155, that added together give a palindrome (49194).

The spelling of 3949155 in words is "three million, nine hundred forty-nine thousand, one hundred fifty-five".