3972217426 has 16 divisors (see below), whose sum is σ = 6162340608. Its totient is φ = 1918350000.

The previous prime is 3972217363. The next prime is 3972217439. The reversal of 3972217426 is 6247122793.

3972217426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3972217426² = 31557022558836130952, which contains 22 as substring.

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, 28825 + ... + 93676.

It is an arithmetic number, because the mean of its divisors is an integer number (385146288).

Almost surely, 2^3972217426 is an apocalyptic number.

3972217426 is a deficient number, since it is larger than the sum of its proper divisors (2190123182).

3972217426 is a wasteful number, since it uses less digits than its factorization.

3972217426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123057.

The product of its digits is 254016, while the sum is 43.

The square root of 3972217426 is about 63025.5299541384. The cubic root of 3972217426 is about 1583.7173362337.

The spelling of 3972217426 in words is "three billion, nine hundred seventy-two million, two hundred seventeen thousand, four hundred twenty-six".