3861399252 has 48 divisors (see below), whose sum is σ = 9470385792. Its totient is φ = 1222172160.

The previous prime is 3861399251. The next prime is 3861399281. The reversal of 3861399252 is 2529931683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861399251) 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, 13249 + ... + 88872.

It is an arithmetic number, because the mean of its divisors is an integer number (197299704).

Almost surely, 2^3861399252 is an apocalyptic number.

It is an amenable number.

3861399252 is an abundant number, since it is smaller than the sum of its proper divisors (5608986540).

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

3861399252 is a wasteful number, since it uses less digits than its factorization.

3861399252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102288 (or 102286 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 3861399252 is about 62140.1581266092. The cubic root of 3861399252 is about 1568.8505321795.

The spelling of 3861399252 in words is "three billion, eight hundred sixty-one million, three hundred ninety-nine thousand, two hundred fifty-two".