3906809742 has 32 divisors (see below), whose sum is σ = 8542425600. Its totient is φ = 1181315520.

The previous prime is 3906809737. The next prime is 3906809759. The reversal of 3906809742 is 2479086093.

It is a super-2 number, since 2×3906809742² = 30526324720372213128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3906809691 and 3906809700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33367 + ... + 94482.

It is an arithmetic number, because the mean of its divisors is an integer number (266950800).

Almost surely, 2^3906809742 is an apocalyptic number.

3906809742 is an abundant number, since it is smaller than the sum of its proper divisors (4635615858).

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

3906809742 is a wasteful number, since it uses less digits than its factorization.

3906809742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128328.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 3906809742 is about 62504.4777755962. The cubic root of 3906809742 is about 1574.9765333868.

The spelling of 3906809742 in words is "three billion, nine hundred six million, eight hundred nine thousand, seven hundred forty-two".