18880394 has 8 divisors (see below), whose sum is σ = 30499140. Its totient is φ = 8714016.

The previous prime is 18880369. The next prime is 18880403. The reversal of 18880394 is 49308881.

It can be written as a sum of positive squares in 2 ways, for example, as 18879025 + 1369 = 4345^2 + 37^2 .

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

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, 363059 + ... + 363110.

Almost surely, 2^18880394 is an apocalyptic number.

18880394 is a deficient number, since it is larger than the sum of its proper divisors (11618746).

18880394 is a wasteful number, since it uses less digits than its factorization.

18880394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726184.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 18880394 is about 4345.1575345435. The cubic root of 18880394 is about 266.2790615342.

The spelling of 18880394 in words is "eighteen million, eight hundred eighty thousand, three hundred ninety-four".