161656028 has 48 divisors (see below), whose sum is σ = 305061120. Its totient is φ = 74732544.

The previous prime is 161656021. The next prime is 161656031. The reversal of 161656028 is 820656161.

It is a happy number.

161656028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161656028² = 52265342777473568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161656021) 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, 837500 + ... + 837692.

It is an arithmetic number, because the mean of its divisors is an integer number (6355440).

Almost surely, 2^161656028 is an apocalyptic number.

It is an amenable number.

161656028 is a deficient number, since it is larger than the sum of its proper divisors (143405092).

161656028 is a wasteful number, since it uses less digits than its factorization.

161656028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 161656028 is about 12714.4023846974. The cubic root of 161656028 is about 544.7500781550.

The spelling of 161656028 in words is "one hundred sixty-one million, six hundred fifty-six thousand, twenty-eight".