3958771640 has 64 divisors (see below), whose sum is σ = 9452570400. Its totient is φ = 1486983168.

The previous prime is 3958771639. The next prime is 3958771667. The reversal of 3958771640 is 461778593.

It is a congruent number.

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, 304391 + ... + 317129.

Almost surely, 2^3958771640 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 3958771640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4726285200).

3958771640 is an abundant number, since it is smaller than the sum of its proper divisors (5493798760).

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

3958771640 is a wasteful number, since it uses less digits than its factorization.

3958771640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224 (or 13220 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 3958771640 is about 62918.7701723421. The cubic root of 3958771640 is about 1581.9283777269.

The spelling of 3958771640 in words is "three billion, nine hundred fifty-eight million, seven hundred seventy-one thousand, six hundred forty".