161023488 has 80 divisors (see below), whose sum is σ = 434734080. Its totient is φ = 52955136.

The previous prime is 161023481. The next prime is 161023543. The reversal of 161023488 is 884320161.

It is a super-2 number, since 2×161023488² = 51857127375372288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161023481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120681 + ... + 122007.

It is an arithmetic number, because the mean of its divisors is an integer number (5434176).

Almost surely, 2^161023488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161023488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217367040).

161023488 is an abundant number, since it is smaller than the sum of its proper divisors (273710592).

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

161023488 is an equidigital number, since it uses as much as digits as its factorization.

161023488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 161023488 is about 12689.5030635561. The cubic root of 161023488 is about 544.0386362409.

The spelling of 161023488 in words is "one hundred sixty-one million, twenty-three thousand, four hundred eighty-eight".