15398173420 has 144 divisors (see below), whose sum is σ = 39326515200. Its totient is φ = 4960061568.

The previous prime is 15398173411. The next prime is 15398173421. The reversal of 15398173420 is 2437189351.

It is not an unprimeable number, because it can be changed into a prime (15398173421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6417381 + ... + 6419779.

It is an arithmetic number, because the mean of its divisors is an integer number (273100800).

Almost surely, 2^15398173420 is an apocalyptic number.

15398173420 is a gapful number since it is divisible by the number (10) 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 15398173420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19663257600).

15398173420 is an abundant number, since it is smaller than the sum of its proper divisors (23928341780).

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

15398173420 is a wasteful number, since it uses less digits than its factorization.

15398173420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580 (or 2559 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 15398173420 in words is "fifteen billion, three hundred ninety-eight million, one hundred seventy-three thousand, four hundred twenty".