3979900 has 18 divisors (see below), whose sum is σ = 8636600. Its totient is φ = 1591920.

The previous prime is 3979891. The next prime is 3979901. The reversal of 3979900 is 99793.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3979900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19800 + ... + 19999.

Almost surely, 2^3979900 is an apocalyptic number.

It is an amenable number.

3979900 is an abundant number, since it is smaller than the sum of its proper divisors (4656700).

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

3979900 is a wasteful number, since it uses less digits than its factorization.

3979900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39813 (or 39806 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 3979900 is about 1994.9686714332. The cubic root of 3979900 is about 158.4737689079.

The spelling of 3979900 in words is "three million, nine hundred seventy-nine thousand, nine hundred".