800123240 has 64 divisors (see below), whose sum is σ = 2065651200. Its totient is φ = 273235968.

The previous prime is 800123239. The next prime is 800123243. The reversal of 800123240 is 42321008.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (800123243) 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, 66401 + ... + 77519.

It is an arithmetic number, because the mean of its divisors is an integer number (32275800).

Almost surely, 2^800123240 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 800123240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032825600).

800123240 is an abundant number, since it is smaller than the sum of its proper divisors (1265527960).

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

800123240 is a wasteful number, since it uses less digits than its factorization.

800123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11394 (or 11390 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 800123240 is about 28286.4497595580. The cubic root of 800123240 is about 928.3654333923.

Adding to 800123240 its reverse (42321008), we get a palindrome (842444248).

The spelling of 800123240 in words is "eight hundred million, one hundred twenty-three thousand, two hundred forty".