161369428 has 24 divisors (see below), whose sum is σ = 309927744. Its totient is φ = 72907200.

The previous prime is 161369419. The next prime is 161369443. The reversal of 161369428 is 824963161.

161369428 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3633 + ... + 18328.

It is an arithmetic number, because the mean of its divisors is an integer number (12913656).

Almost surely, 2^161369428 is an apocalyptic number.

It is an amenable number.

161369428 is a deficient number, since it is larger than the sum of its proper divisors (148558316).

161369428 is a wasteful number, since it uses less digits than its factorization.

161369428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22143 (or 22141 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 161369428 is about 12703.1267017219. The cubic root of 161369428 is about 544.4279585487.

The spelling of 161369428 in words is "one hundred sixty-one million, three hundred sixty-nine thousand, four hundred twenty-eight".