3865421910 has 32 divisors (see below), whose sum is σ = 10602300672. Its totient is φ = 883524960.

The previous prime is 3865421891. The next prime is 3865421927. The reversal of 3865421910 is 191245683.

3865421910 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9203176 + ... + 9203595.

It is an arithmetic number, because the mean of its divisors is an integer number (331321896).

Almost surely, 2^3865421910 is an apocalyptic number.

3865421910 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3865421910 is an abundant number, since it is smaller than the sum of its proper divisors (6736878762).

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

3865421910 is a wasteful number, since it uses less digits than its factorization.

3865421910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18406788.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3865421910 is about 62172.5173207584. The cubic root of 3865421910 is about 1569.3951325949.

The spelling of 3865421910 in words is "three billion, eight hundred sixty-five million, four hundred twenty-one thousand, nine hundred ten".