3944820951 has 12 divisors (see below), whose sum is σ = 5712011760. Its totient is φ = 2623448160.

The previous prime is 3944820949. The next prime is 3944821003. The reversal of 3944820951 is 1590284493.

3944820951 is a `hidden beast` number, since 394 + 4 + 8 + 209 + 51 = 666.

3944820951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3944820951 - 2¹ = 3944820949 is a prime.

It is a super-2 number, since 2×3944820951² = 31123224670897088802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3944820897 and 3944820906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944820911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 532155 + ... + 539516.

It is an arithmetic number, because the mean of its divisors is an integer number (476000980).

Almost surely, 2^3944820951 is an apocalyptic number.

3944820951 is a deficient number, since it is larger than the sum of its proper divisors (1767190809).

3944820951 is a wasteful number, since it uses less digits than its factorization.

3944820951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072086 (or 1072083 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 3944820951 is about 62807.8096338345. The cubic root of 3944820951 is about 1580.0679550701.

The spelling of 3944820951 in words is "three billion, nine hundred forty-four million, eight hundred twenty thousand, nine hundred fifty-one".