161228592 has 120 divisors (see below), whose sum is σ = 524609280. Its totient is φ = 45267840.

The previous prime is 161228581. The next prime is 161228593. The reversal of 161228592 is 295822161.

161228592 is a `hidden beast` number, since 1 + 61 + 2 + 2 + 8 + 592 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161228593) 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, 58117 + ... + 60827.

It is an arithmetic number, because the mean of its divisors is an integer number (4371744).

Almost surely, 2^161228592 is an apocalyptic number.

161228592 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 161228592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262304640).

161228592 is an abundant number, since it is smaller than the sum of its proper divisors (363380688).

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

161228592 is a wasteful number, since it uses less digits than its factorization.

161228592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791 (or 2782 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 161228592 is about 12697.5821320439. The cubic root of 161228592 is about 544.2695283472.

The spelling of 161228592 in words is "one hundred sixty-one million, two hundred twenty-eight thousand, five hundred ninety-two".