391270789056 has 672 divisors, whose sum is σ = 1349720236800. Its totient is φ = 99121397760.

The previous prime is 391270789033. The next prime is 391270789061. The reversal of 391270789056 is 650987072193.

391270789056 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-3 number, since 3×391270789056³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 391270788987 and 391270789005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1005837310 + ... + 1005837698.

Almost surely, 2^391270789056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391270789056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674860118400).

391270789056 is an abundant number, since it is smaller than the sum of its proper divisors (958449447744).

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

391270789056 is a wasteful number, since it uses less digits than its factorization.

391270789056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 391270789056 in words is "three hundred ninety-one billion, two hundred seventy million, seven hundred eighty-nine thousand, fifty-six".