69871056 has 80 divisors (see below), whose sum is σ = 198320640. Its totient is φ = 21098880.

The previous prime is 69871031. The next prime is 69871057. The reversal of 69871056 is 65017896.

69871056 = T₄₂₃ + T₄₂₄ + ... + T₇₉₀.

It is a junction number, because it is equal to n+sod(n) for n = 69870999 and 69871017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69871057) 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, 19311 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (2479008).

Almost surely, 2^69871056 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 69871056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99160320).

69871056 is an abundant number, since it is smaller than the sum of its proper divisors (128449584).

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

69871056 is a wasteful number, since it uses less digits than its factorization.

69871056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 69871056 is about 8358.8908355116. The cubic root of 69871056 is about 411.8753196737.

The spelling of 69871056 in words is "sixty-nine million, eight hundred seventy-one thousand, fifty-six".