3881264985 has 96 divisors (see below), whose sum is σ = 7911924480. Its totient is φ = 1798198272.

The previous prime is 3881264983. The next prime is 3881265049. The reversal of 3881264985 is 5894621883.

It is not a de Polignac number, because 3881264985 - 2¹ = 3881264983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3881264983) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 382852 + ... + 392858.

It is an arithmetic number, because the mean of its divisors is an integer number (82415880).

Almost surely, 2^3881264985 is an apocalyptic number.

It is an amenable number.

3881264985 is an abundant number, since it is smaller than the sum of its proper divisors (4030659495).

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

3881264985 is a wasteful number, since it uses less digits than its factorization.

3881264985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10064 (or 10045 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 3881264985 is about 62299.7992372367. The cubic root of 3881264985 is about 1571.5363522512.

The spelling of 3881264985 in words is "three billion, eight hundred eighty-one million, two hundred sixty-four thousand, nine hundred eighty-five".