15440434324 has 48 divisors (see below), whose sum is σ = 31811472000. Its totient is φ = 6419984256.

The previous prime is 15440434309. The next prime is 15440434351. The reversal of 15440434324 is 42343404451.

It is a super-2 number, since 2×15440434324² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15440434324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136362 + ... + 222430.

It is an arithmetic number, because the mean of its divisors is an integer number (662739000).

Almost surely, 2^15440434324 is an apocalyptic number.

15440434324 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 15440434324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15905736000).

15440434324 is an abundant number, since it is smaller than the sum of its proper divisors (16371037676).

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

15440434324 is a wasteful number, since it uses less digits than its factorization.

15440434324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86272 (or 86270 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 15440434324 its reverse (42343404451), we get a palindrome (57783838775).

The spelling of 15440434324 in words is "fifteen billion, four hundred forty million, four hundred thirty-four thousand, three hundred twenty-four".