3949647100 has 72 divisors (see below), whose sum is σ = 9827565440. Its totient is φ = 1349680320.

The previous prime is 3949647049. The next prime is 3949647109. The reversal of 3949647100 is 17469493.

It is a super-3 number, since 3×3949647100³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949647109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205711 + ... + 224089.

Almost surely, 2^3949647100 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 3949647100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4913782720).

3949647100 is an abundant number, since it is smaller than the sum of its proper divisors (5877918340).

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

3949647100 is a wasteful number, since it uses less digits than its factorization.

3949647100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18707 (or 18700 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 3949647100 is about 62846.2178655168. The cubic root of 3949647100 is about 1580.7120515378.

The spelling of 3949647100 in words is "three billion, nine hundred forty-nine million, six hundred forty-seven thousand, one hundred".