3891839042 has 32 divisors (see below), whose sum is σ = 7337820672. Its totient is φ = 1506867264.

The previous prime is 3891839033. The next prime is 3891839047. The reversal of 3891839042 is 2409381983.

It is a happy number.

It is a super-2 number, since 2×3891839042² = 30292822257670955528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (3891839047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218933 + ... + 236040.

It is an arithmetic number, because the mean of its divisors is an integer number (229306896).

Almost surely, 2^3891839042 is an apocalyptic number.

3891839042 is a deficient number, since it is larger than the sum of its proper divisors (3445981630).

3891839042 is a wasteful number, since it uses less digits than its factorization.

3891839042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455042.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 3891839042 is about 62384.6058094463. The cubic root of 3891839042 is about 1572.9622144377.

The spelling of 3891839042 in words is "three billion, eight hundred ninety-one million, eight hundred thirty-nine thousand, forty-two".