1230340520 has 16 divisors (see below), whose sum is σ = 2768266260. Its totient is φ = 492136192.

The previous prime is 1230340487. The next prime is 1230340523. The reversal of 1230340520 is 250430321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1216753924 + 13586596 = 34882^2 + 3686^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1230340492 and 1230340501.

It is not an unprimeable number, because it can be changed into a prime (1230340523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15379217 + ... + 15379296.

Almost surely, 2^1230340520 is an apocalyptic number.

1230340520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230340520 is an abundant number, since it is smaller than the sum of its proper divisors (1537925740).

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

1230340520 is a wasteful number, since it uses less digits than its factorization.

1230340520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30758524 (or 30758520 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1230340520 is about 35076.2101715679. The cubic root of 1230340520 is about 1071.5401351427.

Adding to 1230340520 its reverse (250430321), we get a palindrome (1480770841).

The spelling of 1230340520 in words is "one billion, two hundred thirty million, three hundred forty thousand, five hundred twenty".