18860406 has 8 divisors (see below), whose sum is σ = 37720824. Its totient is φ = 6286800.

The previous prime is 18860393. The next prime is 18860423. The reversal of 18860406 is 60406881.

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

18860406 is an admirable number.

It is a congruent number.

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, 1571695 + ... + 1571706.

It is an arithmetic number, because the mean of its divisors is an integer number (4715103).

Almost surely, 2^18860406 is an apocalyptic number.

18860406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18860406 is a wasteful number, since it uses less digits than its factorization.

18860406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143406.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18860406 is about 4342.8568937970. The cubic root of 18860406 is about 266.1850616386.

The spelling of 18860406 in words is "eighteen million, eight hundred sixty thousand, four hundred six".