1153021998 has 16 divisors (see below), whose sum is σ = 2380432896. Its totient is φ = 371942520.

The previous prime is 1153021997. The next prime is 1153021999. The reversal of 1153021998 is 8991203511.

It is an interprime number because it is at equal distance from previous prime (1153021997) and next prime (1153021999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153021997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099336 + ... + 3099707.

It is an arithmetic number, because the mean of its divisors is an integer number (148777056).

Almost surely, 2^1153021998 is an apocalyptic number.

1153021998 is an abundant number, since it is smaller than the sum of its proper divisors (1227410898).

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

1153021998 is a wasteful number, since it uses less digits than its factorization.

1153021998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199079.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 1153021998 is about 33956.1776117395. The cubic root of 1153021998 is about 1048.6064651844.

The spelling of 1153021998 in words is "one billion, one hundred fifty-three million, twenty-one thousand, nine hundred ninety-eight".