389690256872 has 64 divisors (see below), whose sum is σ = 856719849600. Its totient is φ = 162726359040.

The previous prime is 389690256853. The next prime is 389690256883. The reversal of 389690256872 is 278652096983.

It is a super-3 number, since 3×389690256872³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 389690256799 and 389690256808.

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 15 ways as a sum of consecutive naturals, for example, 148529 + ... + 895232.

It is an arithmetic number, because the mean of its divisors is an integer number (13386247650).

Almost surely, 2^389690256872 is an apocalyptic number.

It is an amenable number.

389690256872 is an abundant number, since it is smaller than the sum of its proper divisors (467029592728).

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

389690256872 is a wasteful number, since it uses less digits than its factorization.

389690256872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043946 (or 1043942 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 389690256872 in words is "three hundred eighty-nine billion, six hundred ninety million, two hundred fifty-six thousand, eight hundred seventy-two".