161793488 has 20 divisors (see below), whose sum is σ = 331915140. Its totient is φ = 76137984.

The previous prime is 161793487. The next prime is 161793491. The reversal of 161793488 is 884397161.

It can be written as a sum of positive squares in 2 ways, for example, as 140375104 + 21418384 = 11848^2 + 4628^2 .

It is a super-2 number, since 2×161793488² = 52354265518412288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161793487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297143 + ... + 297686.

It is an arithmetic number, because the mean of its divisors is an integer number (16595757).

Almost surely, 2^161793488 is an apocalyptic number.

It is an amenable number.

161793488 is an abundant number, since it is smaller than the sum of its proper divisors (170121652).

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

161793488 is a wasteful number, since it uses less digits than its factorization.

161793488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594854 (or 594848 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 161793488 is about 12719.8069167735. The cubic root of 161793488 is about 544.9044390991.

The spelling of 161793488 in words is "one hundred sixty-one million, seven hundred ninety-three thousand, four hundred eighty-eight".