161633028 has 12 divisors (see below), whose sum is σ = 377143760. Its totient is φ = 53877672.

The previous prime is 161632997. The next prime is 161633033. The reversal of 161633028 is 820336161.

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

It is a super-2 number, since 2×161633028² = 52250471480897568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161632986 and 161633004.

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, 6734698 + ... + 6734721.

Almost surely, 2^161633028 is an apocalyptic number.

It is an amenable number.

161633028 is an abundant number, since it is smaller than the sum of its proper divisors (215510732).

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

161633028 is a wasteful number, since it uses less digits than its factorization.

161633028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469426 (or 13469424 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 161633028 is about 12713.4978664410. The cubic root of 161633028 is about 544.7242417207.

Adding to 161633028 its reverse (820336161), we get a palindrome (981969189).

It can be divided in two parts, 16163 and 3028, that added together give a palindrome (19191).

The spelling of 161633028 in words is "one hundred sixty-one million, six hundred thirty-three thousand, twenty-eight".