1363240638 has 64 divisors (see below), whose sum is σ = 3096737280. Its totient is φ = 444429504.

The previous prime is 1363240631. The next prime is 1363240643. The reversal of 1363240638 is 8360423631.

1363240638 is a `hidden beast` number, since 13 + 6 + 3 + 2 + 4 + 0 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1363240631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460170 + ... + 463122.

It is an arithmetic number, because the mean of its divisors is an integer number (48386520).

Almost surely, 2^1363240638 is an apocalyptic number.

1363240638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1363240638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1548368640).

1363240638 is an abundant number, since it is smaller than the sum of its proper divisors (1733496642).

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

1363240638 is a wasteful number, since it uses less digits than its factorization.

1363240638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3144 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1363240638 is about 36922.0887545653. The cubic root of 1363240638 is about 1108.8109546387.

The spelling of 1363240638 in words is "one billion, three hundred sixty-three million, two hundred forty thousand, six hundred thirty-eight".