3961772128 has 48 divisors (see below), whose sum is σ = 8240460480. Its totient is φ = 1871865856.

The previous prime is 3961772107. The next prime is 3961772153. The reversal of 3961772128 is 8212771693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1801 + ... + 89032.

It is an arithmetic number, because the mean of its divisors is an integer number (171676260).

Almost surely, 2^3961772128 is an apocalyptic number.

It is an amenable number.

3961772128 is an abundant number, since it is smaller than the sum of its proper divisors (4278688352).

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

3961772128 is a wasteful number, since it uses less digits than its factorization.

3961772128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90919 (or 90911 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 3961772128 is about 62942.6097965440. The cubic root of 3961772128 is about 1582.3279426137.

The spelling of 3961772128 in words is "three billion, nine hundred sixty-one million, seven hundred seventy-two thousand, one hundred twenty-eight".