16870405 has 8 divisors (see below), whose sum is σ = 20715552. Its totient is φ = 13182288.

The previous prime is 16870379. The next prime is 16870421. The reversal of 16870405 is 50407861.

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 16870405 - 2¹⁵ = 16837637 is a prime.

It is a super-2 number, since 2×16870405² = 569221129728050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39019 + ... + 39448.

It is an arithmetic number, because the mean of its divisors is an integer number (2589444).

Almost surely, 2^16870405 is an apocalyptic number.

It is an amenable number.

16870405 is a deficient number, since it is larger than the sum of its proper divisors (3845147).

16870405 is an equidigital number, since it uses as much as digits as its factorization.

16870405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78515.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 16870405 is about 4107.3598576214. The cubic root of 16870405 is about 256.4731088822.

The spelling of 16870405 in words is "sixteen million, eight hundred seventy thousand, four hundred five".