869720040 has 192 divisors, whose sum is σ = 3244924800. Its totient is φ = 197899776.

The previous prime is 869720011. The next prime is 869720057. The reversal of 869720040 is 40027968.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 869719977 and 869720004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 677239 + ... + 678521.

It is an arithmetic number, because the mean of its divisors is an integer number (16900650).

Almost surely, 2^869720040 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 869720040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1622462400).

869720040 is an abundant number, since it is smaller than the sum of its proper divisors (2375204760).

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

869720040 is a wasteful number, since it uses less digits than its factorization.

869720040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 869720040 is about 29491.0162591932. The cubic root of 869720040 is about 954.5378610651.

The spelling of 869720040 in words is "eight hundred sixty-nine million, seven hundred twenty thousand, forty".