1389249198 has 16 divisors (see below), whose sum is σ = 3087220560. Its totient is φ = 463083048.

The previous prime is 1389249193. The next prime is 1389249217. The reversal of 1389249198 is 8919429831.

1389249198 is a `hidden beast` number, since 1 + 389 + 249 + 19 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 25726837 = 1389249198 / (1 + 3 + 8 + 9 + 2 + 4 + 9 + 1 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389249193) 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, 12863365 + ... + 12863472.

It is an arithmetic number, because the mean of its divisors is an integer number (192951285).

Almost surely, 2^1389249198 is an apocalyptic number.

1389249198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1389249198 is an abundant number, since it is smaller than the sum of its proper divisors (1697971362).

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

1389249198 is a wasteful number, since it uses less digits than its factorization.

1389249198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25726848 (or 25726842 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 1389249198 is about 37272.6333655136. The cubic root of 1389249198 is about 1115.8180562448.

The spelling of 1389249198 in words is "one billion, three hundred eighty-nine million, two hundred forty-nine thousand, one hundred ninety-eight".