161892432 has 120 divisors (see below), whose sum is σ = 506155104. Its totient is φ = 49797504.

The previous prime is 161892421. The next prime is 161892439. The reversal of 161892432 is 234298161.

161892432 is a `hidden beast` number, since 1 + 618 + 9 + 2 + 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 not an unprimeable number, because it can be changed into a prime (161892439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48943 + ... + 52145.

Almost surely, 2^161892432 is an apocalyptic number.

161892432 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 161892432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253077552).

161892432 is an abundant number, since it is smaller than the sum of its proper divisors (344262672).

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

161892432 is a wasteful number, since it uses less digits than its factorization.

161892432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239 (or 3221 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 161892432 is about 12723.6956895393. The cubic root of 161892432 is about 545.0154943270.

The spelling of 161892432 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, four hundred thirty-two".