161869488 has 80 divisors (see below), whose sum is σ = 458220672. Its totient is φ = 48832000.

The previous prime is 161869483. The next prime is 161869489. The reversal of 161869488 is 884968161.

161869488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161869488² = 52403462290764288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161869488.

It is not an unprimeable number, because it can be changed into a prime (161869481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147823 + ... + 148913.

Almost surely, 2^161869488 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 161869488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229110336).

161869488 is an abundant number, since it is smaller than the sum of its proper divisors (296351184).

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

161869488 is a wasteful number, since it uses less digits than its factorization.

161869488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1388 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 161869488 is about 12722.7940327587. The cubic root of 161869488 is about 544.9897459003.

The spelling of 161869488 in words is "one hundred sixty-one million, eight hundred sixty-nine thousand, four hundred eighty-eight".