869057280 has 432 divisors, whose sum is σ = 3705199680. Its totient is φ = 183140352.

The previous prime is 869057269. The next prime is 869057281. The reversal of 869057280 is 82750968.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (869057281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1047906 + ... + 1048734.

Almost surely, 2^869057280 is an apocalyptic number.

869057280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869057280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852599840).

869057280 is an abundant number, since it is smaller than the sum of its proper divisors (2836142400).

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

869057280 is a wasteful number, since it uses less digits than its factorization.

869057280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 869057280 is about 29479.7774754152. Note that the first 3 decimals coincide. The cubic root of 869057280 is about 954.2953346399.

The spelling of 869057280 in words is "eight hundred sixty-nine million, fifty-seven thousand, two hundred eighty".