3949018656 has 96 divisors (see below), whose sum is σ = 11320259328. Its totient is φ = 1195434240.

The previous prime is 3949018637. The next prime is 3949018663. The reversal of 3949018656 is 6568109493.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×3949018656³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3949018599 and 3949018608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1970551 + ... + 1972553.

It is an arithmetic number, because the mean of its divisors is an integer number (117919368).

Almost surely, 2^3949018656 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 3949018656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5660129664).

3949018656 is an abundant number, since it is smaller than the sum of its proper divisors (7371240672).

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

3949018656 is a wasteful number, since it uses less digits than its factorization.

3949018656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894 (or 3886 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 3949018656 is about 62841.2178112423. The cubic root of 3949018656 is about 1580.6282093048.

The spelling of 3949018656 in words is "three billion, nine hundred forty-nine million, eighteen thousand, six hundred fifty-six".