3865521038 has 4 divisors (see below), whose sum is σ = 5798281560. Its totient is φ = 1932760518.

The previous prime is 3865521031. The next prime is 3865521061. The reversal of 3865521038 is 8301255683.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 3865520986 and 3865521004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865521031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966380258 + ... + 966380261.

It is an arithmetic number, because the mean of its divisors is an integer number (1449570390).

Almost surely, 2^3865521038 is an apocalyptic number.

3865521038 is a deficient number, since it is larger than the sum of its proper divisors (1932760522).

3865521038 is a wasteful number, since it uses less digits than its factorization.

3865521038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932760521.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 3865521038 is about 62173.3145167603. The cubic root of 3865521038 is about 1569.4085480921.

The spelling of 3865521038 in words is "three billion, eight hundred sixty-five million, five hundred twenty-one thousand, thirty-eight".