3861723438 has 48 divisors (see below), whose sum is σ = 9133662720. Its totient is φ = 1219488696.

The previous prime is 3861723431. The next prime is 3861723449. The reversal of 3861723438 is 8343271683.

3861723438 is a `hidden beast` number, since 3 + 8 + 617 + 23 + 4 + 3 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3861723393 and 3861723402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861723431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199870 + ... + 218337.

It is an arithmetic number, because the mean of its divisors is an integer number (190284640).

Almost surely, 2^3861723438 is an apocalyptic number.

3861723438 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3861723438 is an abundant number, since it is smaller than the sum of its proper divisors (5271939282).

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

3861723438 is a wasteful number, since it uses less digits than its factorization.

3861723438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418243 (or 418231 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 3861723438 is about 62142.7665782591. The cubic root of 3861723438 is about 1568.8944355344.

The spelling of 3861723438 in words is "three billion, eight hundred sixty-one million, seven hundred twenty-three thousand, four hundred thirty-eight".