1389560172 has 192 divisors, whose sum is σ = 4504550400. Its totient is φ = 321592320.

The previous prime is 1389560171. The next prime is 1389560191. The reversal of 1389560172 is 2710659831.

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

It is not an unprimeable number, because it can be changed into a prime (1389560171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 346354 + ... + 350342.

It is an arithmetic number, because the mean of its divisors is an integer number (23461200).

Almost surely, 2^1389560172 is an apocalyptic number.

1389560172 is a gapful number since it is divisible by the number (12) 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 1389560172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252275200).

1389560172 is an abundant number, since it is smaller than the sum of its proper divisors (3114990228).

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

1389560172 is a wasteful number, since it uses less digits than its factorization.

1389560172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1389560172 is about 37276.8047450422. The cubic root of 1389560172 is about 1115.9013061320.

The spelling of 1389560172 in words is "one billion, three hundred eighty-nine million, five hundred sixty thousand, one hundred seventy-two".