3949897900 has 144 divisors (see below), whose sum is σ = 9482205600. Its totient is φ = 1419264000.

The previous prime is 3949897883. The next prime is 3949897921. The reversal of 3949897900 is 97989493.

It is a super-3 number, since 3×3949897900³ (a number of 30 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8796876 + ... + 8797324.

It is an arithmetic number, because the mean of its divisors is an integer number (65848650).

Almost surely, 2^3949897900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3949897900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4741102800).

3949897900 is an abundant number, since it is smaller than the sum of its proper divisors (5532307700).

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

3949897900 is a wasteful number, since it uses less digits than its factorization.

3949897900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 3949897900 is about 62848.2131806466. The cubic root of 3949897900 is about 1580.7455088890.

The spelling of 3949897900 in words is "three billion, nine hundred forty-nine million, eight hundred ninety-seven thousand, nine hundred".