16387812 has 96 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 4582656.

The previous prime is 16387807. The next prime is 16387829. The reversal of 16387812 is 21878361.

16387812 is a `hidden beast` number, since 1 + 638 + 7 + 8 + 12 = 666.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 39864 + ... + 40272.

It is an arithmetic number, because the mean of its divisors is an integer number (516600).

Almost surely, 2^16387812 is an apocalyptic number.

16387812 is a gapful number since it is divisible by the number (12) 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 16387812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24796800).

16387812 is an abundant number, since it is smaller than the sum of its proper divisors (33205788).

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

16387812 is a wasteful number, since it uses less digits than its factorization.

16387812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482 (or 474 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 16387812 is about 4048.1862605369. The cubic root of 16387812 is about 254.0038646156.

The spelling of 16387812 in words is "sixteen million, three hundred eighty-seven thousand, eight hundred twelve".