16406887 has 8 divisors (see below), whose sum is σ = 19853856. Its totient is φ = 13235712.

The previous prime is 16406869. The next prime is 16406891. The reversal of 16406887 is 78860461.

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

It is not a de Polignac number, because 16406887 - 2¹⁹ = 15882599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406827) 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, 68818 + ... + 69055.

It is an arithmetic number, because the mean of its divisors is an integer number (2481732).

Almost surely, 2^16406887 is an apocalyptic number.

16406887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16406887 is a deficient number, since it is larger than the sum of its proper divisors (3446969).

16406887 is a wasteful number, since it uses less digits than its factorization.

16406887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137897.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 16406887 is about 4050.5415687288. The cubic root of 16406887 is about 254.1023777680.

The spelling of 16406887 in words is "sixteen million, four hundred six thousand, eight hundred eighty-seven".