3899846142838 has 4 divisors (see below), whose sum is σ = 5849769214260. Its totient is φ = 1949923071418.

The previous prime is 3899846142823. The next prime is 3899846142839. The reversal of 3899846142838 is 8382416489983.

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 (3899846142839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974961535708 + ... + 974961535711.

It is an arithmetic number, because the mean of its divisors is an integer number (1462442303565).

Almost surely, 2^{3899846142838} is an apocalyptic number.

3899846142838 is a deficient number, since it is larger than the sum of its proper divisors (1949923071422).

3899846142838 is a wasteful number, since it uses less digits than its factorization.

3899846142838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949923071421.

The product of its digits is 573308928, while the sum is 73.

The spelling of 3899846142838 in words is "three trillion, eight hundred ninety-nine billion, eight hundred forty-six million, one hundred forty-two thousand, eight hundred thirty-eight".