1355723540 has 12 divisors (see below), whose sum is σ = 2847019476. Its totient is φ = 542289408.

The previous prime is 1355723521. The next prime is 1355723543. The reversal of 1355723540 is 453275531.

It can be written as a sum of positive squares in 2 ways, for example, as 529276036 + 826447504 = 23006^2 + 28748^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1355723540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355723543) 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, 33893069 + ... + 33893108.

It is an arithmetic number, because the mean of its divisors is an integer number (237251623).

Almost surely, 2^1355723540 is an apocalyptic number.

1355723540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1355723540 is an abundant number, since it is smaller than the sum of its proper divisors (1491295936).

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

1355723540 is a wasteful number, since it uses less digits than its factorization.

1355723540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67786186 (or 67786184 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 1355723540 is about 36820.1512761694. The cubic root of 1355723540 is about 1106.7691512886.

The spelling of 1355723540 in words is "one billion, three hundred fifty-five million, seven hundred twenty-three thousand, five hundred forty".