16138532 has 6 divisors (see below), whose sum is σ = 28242438. Its totient is φ = 8069264.

The previous prime is 16138523. The next prime is 16138537. The reversal of 16138532 is 23583161.

It can be written as a sum of positive squares in only one way, i.e., 9084196 + 7054336 = 3014^2 + 2656^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16138495 and 16138504.

It is not an unprimeable number, because it can be changed into a prime (16138537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2017313 + ... + 2017320.

It is an arithmetic number, because the mean of its divisors is an integer number (4707073).

Almost surely, 2^16138532 is an apocalyptic number.

It is an amenable number.

16138532 is a deficient number, since it is larger than the sum of its proper divisors (12103906).

16138532 is a wasteful number, since it uses less digits than its factorization.

16138532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034637 (or 4034635 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 16138532 is about 4017.2791787477. The cubic root of 16138532 is about 252.7093685491.

The spelling of 16138532 in words is "sixteen million, one hundred thirty-eight thousand, five hundred thirty-two".