3946052781 has 40 divisors (see below), whose sum is σ = 6439143744. Its totient is φ = 2388372480.

The previous prime is 3946052779. The next prime is 3946052797. The reversal of 3946052781 is 1872506493.

3946052781 is a `hidden beast` number, since 3 + 9 + 46 + 0 + 527 + 81 = 666.

3946052781 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3946052781 - 2¹ = 3946052779 is a prime.

It is a super-2 number, since 2×3946052781² = 31142665100875667922, which contains 22 as substring.

3946052781 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946052381) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 787821 + ... + 792813.

It is a 1-persistent number, because it is pandigital, but 2⋅3946052781 = 7892105562 is not.

Almost surely, 2^3946052781 is an apocalyptic number.

It is an amenable number.

3946052781 is a deficient number, since it is larger than the sum of its proper divisors (2493090963).

3946052781 is a wasteful number, since it uses less digits than its factorization.

3946052781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903 (or 5894 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 3946052781 is about 62817.6152126137. The cubic root of 3946052781 is about 1580.2324046588.

It can be divided in two parts, 394605 and 2781, that added together give a triangular number (397386 = T₈₉₁).

The spelling of 3946052781 in words is "three billion, nine hundred forty-six million, fifty-two thousand, seven hundred eighty-one".