1365238644 has 96 divisors (see below), whose sum is σ = 4004754432. Its totient is φ = 354578400.

The previous prime is 1365238631. The next prime is 1365238661. The reversal of 1365238644 is 4468325631.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1365238596 and 1365238605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105699 + ... + 117909.

It is an arithmetic number, because the mean of its divisors is an integer number (41716192).

Almost surely, 2^1365238644 is an apocalyptic number.

1365238644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1365238644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2002377216).

1365238644 is an abundant number, since it is smaller than the sum of its proper divisors (2639515788).

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

1365238644 is a wasteful number, since it uses less digits than its factorization.

1365238644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12258 (or 12234 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 1365238644 is about 36949.1359032928. The cubic root of 1365238644 is about 1109.3523923069.

The spelling of 1365238644 in words is "one billion, three hundred sixty-five million, two hundred thirty-eight thousand, six hundred forty-four".