3721126388 has 12 divisors (see below), whose sum is σ = 7442252832. Its totient is φ = 1594768440.

The previous prime is 3721126351. The next prime is 3721126391. The reversal of 3721126388 is 8836211273.

3721126388 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66448658 + ... + 66448713.

It is an arithmetic number, because the mean of its divisors is an integer number (620187736).

Almost surely, 2^3721126388 is an apocalyptic number.

It is an amenable number.

3721126388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3721126388 is a wasteful number, since it uses less digits than its factorization.

3721126388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132897382 (or 132897380 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 3721126388 is about 61001.0359584163. The cubic root of 3721126388 is about 1549.6185517125.

The spelling of 3721126388 in words is "three billion, seven hundred twenty-one million, one hundred twenty-six thousand, three hundred eighty-eight".