1389351072 has 48 divisors (see below), whose sum is σ = 3649786560. Its totient is φ = 462769152.

The previous prime is 1389351059. The next prime is 1389351077. The reversal of 1389351072 is 2701539831.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1389351072.

It is not an unprimeable number, because it can be changed into a prime (1389351077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144429 + ... + 153747.

It is an arithmetic number, because the mean of its divisors is an integer number (76037220).

Almost surely, 2^1389351072 is an apocalyptic number.

1389351072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389351072 is an abundant number, since it is smaller than the sum of its proper divisors (2260435488).

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

1389351072 is a wasteful number, since it uses less digits than its factorization.

1389351072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885 (or 10877 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1389351072 is about 37273.9999463433. Note that the first 4 decimals coincide. The cubic root of 1389351072 is about 1115.8453299863.

The spelling of 1389351072 in words is "one billion, three hundred eighty-nine million, three hundred fifty-one thousand, seventy-two".