3891023373820 has 24 divisors (see below), whose sum is σ = 8913980820528. Its totient is φ = 1414917590400.

The previous prime is 3891023373817. The next prime is 3891023373851. The reversal of 3891023373820 is 283733201983.

It is a super-2 number, since 2×3891023373820² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8843234721 + ... + 8843235160.

It is an arithmetic number, because the mean of its divisors is an integer number (371415867522).

Almost surely, 2^{3891023373820} is an apocalyptic number.

It is an amenable number.

3891023373820 is an abundant number, since it is smaller than the sum of its proper divisors (5022957446708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891023373820 is a wasteful number, since it uses less digits than its factorization.

3891023373820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17686469901 (or 17686469899 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 3891023373820 in words is "three trillion, eight hundred ninety-one billion, twenty-three million, three hundred seventy-three thousand, eight hundred twenty".