1161918432 has 120 divisors (see below), whose sum is σ = 3448279296. Its totient is φ = 383781888.

The previous prime is 1161918413. The next prime is 1161918449. The reversal of 1161918432 is 2348191611.

1161918432 is a `hidden beast` number, since 1 + 1 + 619 + 1 + 8 + 4 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 290913 + ... + 294879.

Almost surely, 2^1161918432 is an apocalyptic number.

1161918432 is a gapful number since it is divisible by the number (12) 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 1161918432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1724139648).

1161918432 is an abundant number, since it is smaller than the sum of its proper divisors (2286360864).

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

1161918432 is a wasteful number, since it uses less digits than its factorization.

1161918432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102 (or 4085 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1161918432 is about 34086.9246486098. The cubic root of 1161918432 is about 1051.2964882971.

The spelling of 1161918432 in words is "one billion, one hundred sixty-one million, nine hundred eighteen thousand, four hundred thirty-two".