869420544 has 160 divisors (see below), whose sum is σ = 2519362560. Its totient is φ = 265697280.

The previous prime is 869420543. The next prime is 869420549. The reversal of 869420544 is 445024968.

869420544 = T₉₅₅₇ + T₉₅₅₈ + ... + T₉₅₇₅.

It is a junction number, because it is equal to n+sod(n) for n = 869420496 and 869420505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869420543) 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, 28045809 + ... + 28045839.

It is an arithmetic number, because the mean of its divisors is an integer number (15746016).

Almost surely, 2^869420544 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 869420544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259681280).

869420544 is an abundant number, since it is smaller than the sum of its proper divisors (1649942016).

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

869420544 is an frugal number, since it uses more digits than its factorization.

869420544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 869420544 is about 29485.9380722405. The cubic root of 869420544 is about 954.4282805566.

The spelling of 869420544 in words is "eight hundred sixty-nine million, four hundred twenty thousand, five hundred forty-four".