16387072 has 44 divisors (see below), whose sum is σ = 35306656. Its totient is φ = 7557120.

The previous prime is 16387039. The next prime is 16387081. The reversal of 16387072 is 27078361.

It is a super-2 number, since 2×16387072² = 537072257466368, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12697 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (802424).

Almost surely, 2^16387072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16387072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17653328).

16387072 is an abundant number, since it is smaller than the sum of its proper divisors (18919584).

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

16387072 is a wasteful number, since it uses less digits than its factorization.

16387072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264 (or 1246 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 16387072 is about 4048.0948605486. The cubic root of 16387072 is about 254.0000413334. Note that the first 4 decimals are identical.

The spelling of 16387072 in words is "sixteen million, three hundred eighty-seven thousand, seventy-two".