3985388038 has 4 divisors (see below), whose sum is σ = 5978082060. Its totient is φ = 1992694018.

The previous prime is 3985388021. The next prime is 3985388039. The reversal of 3985388038 is 8308835893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8308835893 = 59 ⋅140827727.

It is a self number, because there is not a number n which added to its sum of digits gives 3985388038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985388039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996347008 + ... + 996347011.

It is an arithmetic number, because the mean of its divisors is an integer number (1494520515).

Almost surely, 2^3985388038 is an apocalyptic number.

3985388038 is a deficient number, since it is larger than the sum of its proper divisors (1992694022).

3985388038 is a wasteful number, since it uses less digits than its factorization.

3985388038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992694021.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The square root of 3985388038 is about 63129.9298114611. The cubic root of 3985388038 is about 1585.4657732126.

The spelling of 3985388038 in words is "three billion, nine hundred eighty-five million, three hundred eighty-eight thousand, thirty-eight".