18728016 has 80 divisors (see below), whose sum is σ = 52228800. Its totient is φ = 5761024.

The previous prime is 18728009. The next prime is 18728023. The reversal of 18728016 is 61082781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18728009) and next prime (18728023).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47950 + ... + 48338.

It is an arithmetic number, because the mean of its divisors is an integer number (652860).

Almost surely, 2^18728016 is an apocalyptic number.

18728016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18728016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26114400).

18728016 is an abundant number, since it is smaller than the sum of its proper divisors (33500784).

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

18728016 is a wasteful number, since it uses less digits than its factorization.

18728016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18728016 is about 4327.5877807388. The cubic root of 18728016 is about 265.5607728635.

It can be divided in two parts, 187 and 28016, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 18728016 in words is "eighteen million, seven hundred twenty-eight thousand, sixteen".