161383992 has 192 divisors, whose sum is σ = 537788160. Its totient is φ = 39367680.

The previous prime is 161383991. The next prime is 161384011. The reversal of 161383992 is 299383161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161383991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 345343 + ... + 345809.

It is an arithmetic number, because the mean of its divisors is an integer number (2800980).

Almost surely, 2^161383992 is an apocalyptic number.

161383992 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 161383992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268894080).

161383992 is an abundant number, since it is smaller than the sum of its proper divisors (376404168).

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

161383992 is a wasteful number, since it uses less digits than its factorization.

161383992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 507 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 161383992 is about 12703.6999334839. The cubic root of 161383992 is about 544.4443367239. Note that the first 3 decimals are identical.

The spelling of 161383992 in words is "one hundred sixty-one million, three hundred eighty-three thousand, nine hundred ninety-two".