1129999998 has 16 divisors (see below), whose sum is σ = 2261120256. Its totient is φ = 376479960.

The previous prime is 1129999987. The next prime is 1129999999. The reversal of 1129999998 is 8999999211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129999999) 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, 33268 + ... + 58023.

It is an arithmetic number, because the mean of its divisors is an integer number (141320016).

Almost surely, 2^1129999998 is an apocalyptic number.

1129999998 is an abundant number, since it is smaller than the sum of its proper divisors (1131120258).

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

1129999998 is a wasteful number, since it uses less digits than its factorization.

1129999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93359.

The product of its digits is 8503056, while the sum is 66.

The square root of 1129999998 is about 33615.4725981950. The cubic root of 1129999998 is about 1041.5804366921.

The spelling of 1129999998 in words is "one billion, one hundred twenty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".