16419887 has 8 divisors (see below), whose sum is σ = 18530640. Its totient is φ = 14412160.

The previous prime is 16419883. The next prime is 16419889. The reversal of 16419887 is 78891461.

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 16419887 - 2² = 16419883 is a prime.

It is a super-2 number, since 2×16419887² = 539225378185538, 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 (16419883) 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, 25418 + ... + 26055.

It is an arithmetic number, because the mean of its divisors is an integer number (2316330).

Almost surely, 2^16419887 is an apocalyptic number.

16419887 is a deficient number, since it is larger than the sum of its proper divisors (2110753).

16419887 is a wasteful number, since it uses less digits than its factorization.

16419887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51513.

The product of its digits is 96768, while the sum is 44.

The square root of 16419887 is about 4052.1459746658. The cubic root of 16419887 is about 254.1694727392.

The spelling of 16419887 in words is "sixteen million, four hundred nineteen thousand, eight hundred eighty-seven".