18161528 has 32 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 7075680.

The previous prime is 18161527. The next prime is 18161537. The reversal of 18161528 is 82516181.

It is a junction number, because it is equal to n+sod(n) for n = 18161494 and 18161503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18161527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14126 + ... + 15357.

It is an arithmetic number, because the mean of its divisors is an integer number (1326780).

Almost surely, 2^18161528 is an apocalyptic number.

It is an amenable number.

18161528 is an abundant number, since it is smaller than the sum of its proper divisors (24295432).

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

18161528 is a wasteful number, since it uses less digits than its factorization.

18161528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29507 (or 29503 counting only the distinct ones).

The product of its digits is 3840, while the sum is 32.

The square root of 18161528 is about 4261.6344282446. The cubic root of 18161528 is about 262.8557377952.

The spelling of 18161528 in words is "eighteen million, one hundred sixty-one thousand, five hundred twenty-eight".