1198632500 has 90 divisors (see below), whose sum is σ = 2839308318. Its totient is φ = 442416000.

The previous prime is 1198632497. The next prime is 1198632503. The reversal of 1198632500 is 52368911.

It is an interprime number because it is at equal distance from previous prime (1198632497) and next prime (1198632503).

It can be written as a sum of positive squares in 15 ways, for example, as 837176356 + 361456144 = 28934^2 + 19012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198632503) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 421082 + ... + 423918.

Almost surely, 2^1198632500 is an apocalyptic number.

1198632500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1198632500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419654159).

1198632500 is an abundant number, since it is smaller than the sum of its proper divisors (1640675818).

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

1198632500 is a wasteful number, since it uses less digits than its factorization.

1198632500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887 (or 2857 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1198632500 is about 34621.2723625230. The cubic root of 1198632500 is about 1062.2547530849.

The spelling of 1198632500 in words is "one billion, one hundred ninety-eight million, six hundred thirty-two thousand, five hundred".