1365863730 has 192 divisors, whose sum is σ = 4205779200. Its totient is φ = 283557120.

The previous prime is 1365863713. The next prime is 1365863731. The reversal of 1365863730 is 373685631.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1365863731) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1244542 + ... + 1245638.

It is an arithmetic number, because the mean of its divisors is an integer number (21905100).

Almost surely, 2^1365863730 is an apocalyptic number.

1365863730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1365863730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102889600).

1365863730 is an abundant number, since it is smaller than the sum of its proper divisors (2839915470).

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

1365863730 is a wasteful number, since it uses less digits than its factorization.

1365863730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 1365863730 is about 36957.5936716664. The cubic root of 1365863730 is about 1109.5216752492.

The spelling of 1365863730 in words is "one billion, three hundred sixty-five million, eight hundred sixty-three thousand, seven hundred thirty".