3967643580 has 48 divisors (see below), whose sum is σ = 11120868864. Its totient is φ = 1056946240.

The previous prime is 3967643579. The next prime is 3967643609. The reversal of 3967643580 is 853467693.

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, 25345 + ... + 92615.

It is an arithmetic number, because the mean of its divisors is an integer number (231684768).

Almost surely, 2^3967643580 is an apocalyptic number.

3967643580 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3967643580 is an abundant number, since it is smaller than the sum of its proper divisors (7153225284).

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

3967643580 is a wasteful number, since it uses less digits than its factorization.

3967643580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68266 (or 68264 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 51.

The square root of 3967643580 is about 62989.2338419829. The cubic root of 3967643580 is about 1583.1092408491.

The spelling of 3967643580 in words is "three billion, nine hundred sixty-seven million, six hundred forty-three thousand, five hundred eighty".