15440220832 has 96 divisors (see below), whose sum is σ = 32356558080. Its totient is φ = 7239751680.

The previous prime is 15440220821. The next prime is 15440220833. The reversal of 15440220832 is 23802204451.

It is a junction number, because it is equal to n+sod(n) for n = 15440220794 and 15440220803.

It is not an unprimeable number, because it can be changed into a prime (15440220833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10005853 + ... + 10007395.

It is an arithmetic number, because the mean of its divisors is an integer number (337047480).

Almost surely, 2^15440220832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15440220832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16178279040).

15440220832 is an abundant number, since it is smaller than the sum of its proper divisors (16916337248).

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

15440220832 is a wasteful number, since it uses less digits than its factorization.

15440220832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 15440220832 in words is "fifteen billion, four hundred forty million, two hundred twenty thousand, eight hundred thirty-two".