1366403538 has 32 divisors (see below), whose sum is σ = 2824729920. Its totient is φ = 440400960.

The previous prime is 1366403537. The next prime is 1366403579. The reversal of 1366403538 is 8353046631.

It is a junction number, because it is equal to n+sod(n) for n = 1366403496 and 1366403505.

It is not an unprimeable number, because it can be changed into a prime (1366403531) 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, 10045 + ... + 53232.

It is an arithmetic number, because the mean of its divisors is an integer number (88272810).

Almost surely, 2^1366403538 is an apocalyptic number.

1366403538 is an abundant number, since it is smaller than the sum of its proper divisors (1458326382).

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

1366403538 is a wasteful number, since it uses less digits than its factorization.

1366403538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63402.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1366403538 is about 36964.8960231190. The cubic root of 1366403538 is about 1109.6678220375.

The spelling of 1366403538 in words is "one billion, three hundred sixty-six million, four hundred three thousand, five hundred thirty-eight".