16538328 has 24 divisors (see below), whose sum is σ = 44791500. Its totient is φ = 5512752.

The previous prime is 16538309. The next prime is 16538339. The reversal of 16538328 is 82383561.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16538292 and 16538301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114778 + ... + 114921.

Almost surely, 2^16538328 is an apocalyptic number.

16538328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16538328 is an abundant number, since it is smaller than the sum of its proper divisors (28253172).

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

16538328 is a wasteful number, since it uses less digits than its factorization.

16538328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229711 (or 229704 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 16538328 is about 4066.7343163772. The cubic root of 16538328 is about 254.7791397906.

The spelling of 16538328 in words is "sixteen million, five hundred thirty-eight thousand, three hundred twenty-eight".