16538428 has 12 divisors (see below), whose sum is σ = 29002680. Its totient is φ = 8251952.

The previous prime is 16538419. The next prime is 16538429. The reversal of 16538428 is 82483561.

It is a happy number.

It is a super-2 number, since 2×16538428² = 547039201422368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16538429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2026 + ... + 6097.

It is an arithmetic number, because the mean of its divisors is an integer number (2416890).

Almost surely, 2^16538428 is an apocalyptic number.

It is an amenable number.

16538428 is a deficient number, since it is larger than the sum of its proper divisors (12464252).

16538428 is a wasteful number, since it uses less digits than its factorization.

16538428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636 (or 8634 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 16538428 is about 4066.7466112361. The cubic root of 16538428 is about 254.7796533021.

The spelling of 16538428 in words is "sixteen million, five hundred thirty-eight thousand, four hundred twenty-eight".