161335428 has 12 divisors (see below), whose sum is σ = 376449360. Its totient is φ = 53778472.

The previous prime is 161335417. The next prime is 161335463. The reversal of 161335428 is 824533161.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6722298 + ... + 6722321.

It is an arithmetic number, because the mean of its divisors is an integer number (31370780).

Almost surely, 2^161335428 is an apocalyptic number.

It is an amenable number.

161335428 is an abundant number, since it is smaller than the sum of its proper divisors (215113932).

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

161335428 is a wasteful number, since it uses less digits than its factorization.

161335428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13444626 (or 13444624 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 161335428 is about 12701.7883780198. The cubic root of 161335428 is about 544.3897194783.

Adding to 161335428 its reverse (824533161), we get a palindrome (985868589).

The spelling of 161335428 in words is "one hundred sixty-one million, three hundred thirty-five thousand, four hundred twenty-eight".