869481720 has 96 divisors (see below), whose sum is σ = 2833945920. Its totient is φ = 231194880.

The previous prime is 869481661. The next prime is 869481727. The reversal of 869481720 is 27184968.

It is a super-2 number, since 2×869481720² = 1511996922828316800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869481727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128830 + ... + 135410.

It is an arithmetic number, because the mean of its divisors is an integer number (29520270).

Almost surely, 2^869481720 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 869481720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416972960).

869481720 is an abundant number, since it is smaller than the sum of its proper divisors (1964464200).

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

869481720 is a wasteful number, since it uses less digits than its factorization.

869481720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6965 (or 6958 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 869481720 is about 29486.9754298402. The cubic root of 869481720 is about 954.4506658628.

The spelling of 869481720 in words is "eight hundred sixty-nine million, four hundred eighty-one thousand, seven hundred twenty".