3980638581 has 8 divisors (see below), whose sum is σ = 5312248800. Its totient is φ = 2651393712.

The previous prime is 3980638579. The next prime is 3980638603. The reversal of 3980638581 is 1858360893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3980638581 - 2¹ = 3980638579 is a prime.

It is a super-2 number, since 2×3980638581² = 31690967025091387122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3980630581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587406 + ... + 594143.

It is an arithmetic number, because the mean of its divisors is an integer number (664031100).

Almost surely, 2^3980638581 is an apocalyptic number.

It is an amenable number.

3980638581 is a deficient number, since it is larger than the sum of its proper divisors (1331610219).

3980638581 is a wasteful number, since it uses less digits than its factorization.

3980638581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182675.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 3980638581 is about 63092.3020740248. The cubic root of 3980638581 is about 1584.8357137155.

It can be divided in two parts, 39806 and 38581, that added together give a palindrome (78387).

The spelling of 3980638581 in words is "three billion, nine hundred eighty million, six hundred thirty-eight thousand, five hundred eighty-one".