3955990 has 32 divisors (see below), whose sum is σ = 7672320. Its totient is φ = 1463904.

The previous prime is 3955979. The next prime is 3955993. The reversal of 3955990 is 995593.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3955993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8709 + ... + 9151.

It is an arithmetic number, because the mean of its divisors is an integer number (239760).

Almost surely, 2^3955990 is an apocalyptic number.

3955990 is a deficient number, since it is larger than the sum of its proper divisors (3716330).

3955990 is a wasteful number, since it uses less digits than its factorization.

3955990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 54675, while the sum is 40.

The square root of 3955990 is about 1988.9670686062. The cubic root of 3955990 is about 158.1557775707.

The spelling of 3955990 in words is "three million, nine hundred fifty-five thousand, nine hundred ninety".