1389088752 has 40 divisors (see below), whose sum is σ = 3598519680. Its totient is φ = 461734080.

The previous prime is 1389088721. The next prime is 1389088759. The reversal of 1389088752 is 2578809831.

It is a junction number, because it is equal to n+sod(n) for n = 1389088695 and 1389088704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389088759) 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, 23074 + ... + 57537.

It is an arithmetic number, because the mean of its divisors is an integer number (89962992).

Almost surely, 2^1389088752 is an apocalyptic number.

1389088752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1389088752 is an abundant number, since it is smaller than the sum of its proper divisors (2209430928).

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

1389088752 is a wasteful number, since it uses less digits than its factorization.

1389088752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80981 (or 80975 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 1389088752 is about 37270.4809735533. The cubic root of 1389088752 is about 1115.7750988842.

The spelling of 1389088752 in words is "one billion, three hundred eighty-nine million, eighty-eight thousand, seven hundred fifty-two".