870521520 has 160 divisors (see below), whose sum is σ = 2960524800. Its totient is φ = 209848320.

The previous prime is 870521479. The next prime is 870521543. The reversal of 870521520 is 25125078.

870521520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×870521520² = 1515615433566220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 524532 + ... + 526188.

It is an arithmetic number, because the mean of its divisors is an integer number (18503280).

Almost surely, 2^870521520 is an apocalyptic number.

870521520 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 870521520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480262400).

870521520 is an abundant number, since it is smaller than the sum of its proper divisors (2090003280).

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

870521520 is a wasteful number, since it uses less digits than its factorization.

870521520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 870521520 is about 29504.6016749930. The cubic root of 870521520 is about 954.8309853214.

Adding to 870521520 its reverse (25125078), we get a palindrome (895646598).

The spelling of 870521520 in words is "eight hundred seventy million, five hundred twenty-one thousand, five hundred twenty".