1389053750 has 40 divisors (see below), whose sum is σ = 2975610000. Its totient is φ = 476244000.

The previous prime is 1389053717. The next prime is 1389053779. The reversal of 1389053750 is 573509831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1389053698 and 1389053707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70625 + ... + 88124.

It is an arithmetic number, because the mean of its divisors is an integer number (74390250).

Almost surely, 2^1389053750 is an apocalyptic number.

1389053750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389053750 is an abundant number, since it is smaller than the sum of its proper divisors (1586556250).

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

1389053750 is an equidigital number, since it uses as much as digits as its factorization.

1389053750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158778 (or 158763 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1389053750 is about 37270.0114032717. The cubic root of 1389053750 is about 1115.7657271077.

The spelling of 1389053750 in words is "one billion, three hundred eighty-nine million, fifty-three thousand, seven hundred fifty".