1145887998 has 8 divisors (see below), whose sum is σ = 2291776008. Its totient is φ = 381962664.

The previous prime is 1145887987. The next prime is 1145888017. The reversal of 1145887998 is 8997885411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1145887998 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 95490661 + ... + 95490672.

It is an arithmetic number, because the mean of its divisors is an integer number (286472001).

Almost surely, 2^1145887998 is an apocalyptic number.

1145887998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1145887998 is a wasteful number, since it uses less digits than its factorization.

1145887998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190981338.

The product of its digits is 5806080, while the sum is 60.

The square root of 1145887998 is about 33850.9674603253. The cubic root of 1145887998 is about 1046.4393367883.

The spelling of 1145887998 in words is "one billion, one hundred forty-five million, eight hundred eighty-seven thousand, nine hundred ninety-eight".