3906539840 has 168 divisors, whose sum is σ = 11222687232. Its totient is φ = 1268628480.

The previous prime is 3906539807. The next prime is 3906539849. The reversal of 3906539840 is 489356093.

It is a super-2 number, since 2×3906539840² = 30522107043014451200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906539849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 806225 + ... + 811055.

Almost surely, 2^3906539840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3906539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5611343616).

3906539840 is an abundant number, since it is smaller than the sum of its proper divisors (7316147392).

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

3906539840 is a wasteful number, since it uses less digits than its factorization.

3906539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893 (or 4864 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 3906539840 is about 62502.3186769899. The cubic root of 3906539840 is about 1574.9402634604.

The spelling of 3906539840 in words is "three billion, nine hundred six million, five hundred thirty-nine thousand, eight hundred forty".