1161828450 has 144 divisors (see below), whose sum is σ = 3419680680. Its totient is φ = 281487360.

The previous prime is 1161828401. The next prime is 1161828487. The reversal of 1161828450 is 548281611.

1161828450 is a `hidden beast` number, since 11 + 618 + 28 + 4 + 5 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 379899081 + 781929369 = 19491^2 + 27963^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 219232 + ... + 224468.

Almost surely, 2^1161828450 is an apocalyptic number.

1161828450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161828450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709840340).

1161828450 is an abundant number, since it is smaller than the sum of its proper divisors (2257852230).

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

1161828450 is a wasteful number, since it uses less digits than its factorization.

1161828450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5301 (or 5293 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 1161828450 is about 34085.6047327901. The cubic root of 1161828450 is about 1051.2693492140.

The spelling of 1161828450 in words is "one billion, one hundred sixty-one million, eight hundred twenty-eight thousand, four hundred fifty".