3985621342 has 4 divisors (see below), whose sum is σ = 5978432016. Its totient is φ = 1992810670.

The previous prime is 3985621333. The next prime is 3985621349. The reversal of 3985621342 is 2431265893.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985621349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996405334 + ... + 996405337.

It is an arithmetic number, because the mean of its divisors is an integer number (1494608004).

Almost surely, 2^3985621342 is an apocalyptic number.

3985621342 is a deficient number, since it is larger than the sum of its proper divisors (1992810674).

3985621342 is a wasteful number, since it uses less digits than its factorization.

3985621342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992810673.

The product of its digits is 311040, while the sum is 43.

The square root of 3985621342 is about 63131.7775925880. Note that the first 3 decimals coincide. The cubic root of 3985621342 is about 1585.4967102494.

The spelling of 3985621342 in words is "three billion, nine hundred eighty-five million, six hundred twenty-one thousand, three hundred forty-two".