1356123340 has 48 divisors (see below), whose sum is σ = 3345743520. Its totient is φ = 455201280.

The previous prime is 1356123323. The next prime is 1356123389. The reversal of 1356123340 is 433216531.

It is a junction number, because it is equal to n+sod(n) for n = 1356123299 and 1356123308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234225 + ... + 239944.

It is an arithmetic number, because the mean of its divisors is an integer number (69702990).

Almost surely, 2^1356123340 is an apocalyptic number.

1356123340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1356123340 is an abundant number, since it is smaller than the sum of its proper divisors (1989620180).

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

1356123340 is a wasteful number, since it uses less digits than its factorization.

1356123340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474202 (or 474200 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1356123340 is about 36825.5799682775. The cubic root of 1356123340 is about 1106.8779352220.

Adding to 1356123340 its reverse (433216531), we get a palindrome (1789339871).

The spelling of 1356123340 in words is "one billion, three hundred fifty-six million, one hundred twenty-three thousand, three hundred forty".