1078123198 has 32 divisors (see below), whose sum is σ = 1696917600. Its totient is φ = 513077376.

The previous prime is 1078123171. The next prime is 1078123199. The reversal of 1078123198 is 8913218701.

It is a self number, because there is not a number n which added to its sum of digits gives 1078123198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078123199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1394340 + ... + 1395112.

It is an arithmetic number, because the mean of its divisors is an integer number (53028675).

Almost surely, 2^1078123198 is an apocalyptic number.

1078123198 is a deficient number, since it is larger than the sum of its proper divisors (618794402).

1078123198 is a wasteful number, since it uses less digits than its factorization.

1078123198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 1078123198 is about 32834.7864010107. The cubic root of 1078123198 is about 1025.3909111386.

The spelling of 1078123198 in words is "one billion, seventy-eight million, one hundred twenty-three thousand, one hundred ninety-eight".