1389294250 has 32 divisors (see below), whose sum is σ = 2737650240. Its totient is φ = 526467600.

The previous prime is 1389294239. The next prime is 1389294251. The reversal of 1389294250 is 524929831.

It is a junction number, because it is equal to n+sod(n) for n = 1389294197 and 1389294206.

It is not an unprimeable number, because it can be changed into a prime (1389294251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141492 + ... + 150991.

It is an arithmetic number, because the mean of its divisors is an integer number (85551570).

Almost surely, 2^1389294250 is an apocalyptic number.

1389294250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1389294250 is a deficient number, since it is larger than the sum of its proper divisors (1348355990).

1389294250 is a wasteful number, since it uses less digits than its factorization.

1389294250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292519 (or 292509 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1389294250 is about 37273.2377182342. The cubic root of 1389294250 is about 1115.8301177458.

The spelling of 1389294250 in words is "one billion, three hundred eighty-nine million, two hundred ninety-four thousand, two hundred fifty".