16487381 has 8 divisors (see below), whose sum is σ = 17197824. Its totient is φ = 15788160.

The previous prime is 16487377. The next prime is 16487413. The reversal of 16487381 is 18378461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16487381 - 2² = 16487377 is a prime.

It is a super-2 number, since 2×16487381² = 543667464478322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (2149728).

Almost surely, 2^16487381 is an apocalyptic number.

It is an amenable number.

16487381 is a deficient number, since it is larger than the sum of its proper divisors (710443).

16487381 is an equidigital number, since it uses as much as digits as its factorization.

16487381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611.

The product of its digits is 32256, while the sum is 38.

The square root of 16487381 is about 4060.4656136951. The cubic root of 16487381 is about 254.5172514787.

The spelling of 16487381 in words is "sixteen million, four hundred eighty-seven thousand, three hundred eighty-one".