1198357440 has 112 divisors (see below), whose sum is σ = 4348349952. Its totient is φ = 273908736.

The previous prime is 1198357361. The next prime is 1198357441. The reversal of 1198357440 is 447538911.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1198357392 and 1198357401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198357441) 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, 82444 + ... + 95883.

Almost surely, 2^1198357440 is an apocalyptic number.

1198357440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1198357440 is an abundant number, since it is smaller than the sum of its proper divisors (3149992512).

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

1198357440 is a wasteful number, since it uses less digits than its factorization.

1198357440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178354 (or 178344 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1198357440 is about 34617.2997213821. The cubic root of 1198357440 is about 1062.1734921076.

The spelling of 1198357440 in words is "one billion, one hundred ninety-eight million, three hundred fifty-seven thousand, four hundred forty".