3855664836 has 81 divisors (see below), whose sum is σ = 9947123823. Its totient is φ = 1259266320.

The previous prime is 3855664807. The next prime is 3855664837. The reversal of 3855664836 is 6384665583.

It is a happy number.

The square root of 3855664836 is 62094.

It is a perfect power (a square), and thus also a powerful number.

3855664836 is a `hidden beast` number, since 3 + 8 + 5 + 566 + 48 + 36 = 666.

It is not an unprimeable number, because it can be changed into a prime (3855664837) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29432491 + ... + 29432621.

Almost surely, 2^3855664836 is an apocalyptic number.

3855664836 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

3855664836 is the 62094-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3855664836

3855664836 is an abundant number, since it is smaller than the sum of its proper divisors (6091458987).

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

3855664836 is a wasteful number, since it uses less digits than its factorization.

3855664836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 215 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The cubic root of 3855664836 is about 1568.0735341616.

The spelling of 3855664836 in words is "three billion, eight hundred fifty-five million, six hundred sixty-four thousand, eight hundred thirty-six".