3864887811 has 16 divisors (see below), whose sum is σ = 5776434720. Its totient is φ = 2553788160.

The previous prime is 3864887809. The next prime is 3864887821. The reversal of 3864887811 is 1187884683.

It is a happy number.

3864887811 is a `hidden beast` number, since 3 + 86 + 488 + 7 + 81 + 1 = 666.

It is not a de Polignac number, because 3864887811 - 2¹ = 3864887809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3864887821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630330 + ... + 636431.

It is an arithmetic number, because the mean of its divisors is an integer number (361027170).

Almost surely, 2^3864887811 is an apocalyptic number.

3864887811 is a deficient number, since it is larger than the sum of its proper divisors (1911546909).

3864887811 is a wasteful number, since it uses less digits than its factorization.

3864887811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266883 (or 1266877 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 3864887811 is about 62168.2218742019. The cubic root of 3864887811 is about 1569.3228463089.

The spelling of 3864887811 in words is "three billion, eight hundred sixty-four million, eight hundred eighty-seven thousand, eight hundred eleven".