11438215530 has 192 divisors, whose sum is σ = 32671123200. Its totient is φ = 2554675200.

The previous prime is 11438215507. The next prime is 11438215543. The reversal of 11438215530 is 3551283411.

It is a junction number, because it is equal to n+sod(n) for n = 11438215491 and 11438215500.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17844010 + ... + 17844650.

It is an arithmetic number, because the mean of its divisors is an integer number (170162100).

Almost surely, 2^11438215530 is an apocalyptic number.

11438215530 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 11438215530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16335561600).

11438215530 is an abundant number, since it is smaller than the sum of its proper divisors (21232907670).

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

11438215530 is a wasteful number, since it uses less digits than its factorization.

11438215530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 11438215530 its reverse (3551283411), we get a palindrome (14989498941).

The spelling of 11438215530 in words is "eleven billion, four hundred thirty-eight million, two hundred fifteen thousand, five hundred thirty".