3977537172 has 72 divisors (see below), whose sum is σ = 10891895616. Its totient is φ = 1126363392.

The previous prime is 3977537167. The next prime is 3977537183. The reversal of 3977537172 is 2717357793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36513 + ... + 96375.

It is an arithmetic number, because the mean of its divisors is an integer number (151276328).

Almost surely, 2^3977537172 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 3977537172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5445947808).

3977537172 is an abundant number, since it is smaller than the sum of its proper divisors (6914358444).

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

3977537172 is a wasteful number, since it uses less digits than its factorization.

3977537172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59997 (or 59988 counting only the distinct ones).

The product of its digits is 1944810, while the sum is 51.

The square root of 3977537172 is about 63067.7189376626. The cubic root of 3977537172 is about 1584.4240125340.

The spelling of 3977537172 in words is "three billion, nine hundred seventy-seven million, five hundred thirty-seven thousand, one hundred seventy-two".