1198398040 has 64 divisors (see below), whose sum is σ = 3085205760. Its totient is φ = 410398080.

The previous prime is 1198398037. The next prime is 1198398041. The reversal of 1198398040 is 408938911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198398041) 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, 303519 + ... + 307441.

It is an arithmetic number, because the mean of its divisors is an integer number (48206340).

Almost surely, 2^1198398040 is an apocalyptic number.

1198398040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1198398040 is an abundant number, since it is smaller than the sum of its proper divisors (1886807720).

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

1198398040 is a wasteful number, since it uses less digits than its factorization.

1198398040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 1198398040 is about 34617.8861284163. The cubic root of 1198398040 is about 1062.1854873480.

The spelling of 1198398040 in words is "one billion, one hundred ninety-eight million, three hundred ninety-eight thousand, forty".