1198088857 has 6 divisors (see below), whose sum is σ = 1393695258. Its totient is φ = 1026933264.

The previous prime is 1198088851. The next prime is 1198088867. The reversal of 1198088857 is 7588808911.

It can be written as a sum of positive squares in only one way, i.e., 1116294921 + 81793936 = 33411^2 + 9044^2 .

It is not a de Polignac number, because 1198088857 - 2³ = 1198088849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1198088798 and 1198088807.

It is not an unprimeable number, because it can be changed into a prime (1198088851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12225348 + ... + 12225445.

It is an arithmetic number, because the mean of its divisors is an integer number (232282543).

Almost surely, 2^1198088857 is an apocalyptic number.

It is an amenable number.

1198088857 is a deficient number, since it is larger than the sum of its proper divisors (195606401).

1198088857 is an equidigital number, since it uses as much as digits as its factorization.

1198088857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450807 (or 24450800 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 55.

The square root of 1198088857 is about 34613.4201863959. The cubic root of 1198088857 is about 1062.0941326307.

The spelling of 1198088857 in words is "one billion, one hundred ninety-eight million, eighty-eight thousand, eight hundred fifty-seven".