18277990 has 8 divisors (see below), whose sum is σ = 32900400. Its totient is φ = 7311192.

The previous prime is 18277957. The next prime is 18277997. The reversal of 18277990 is 9977281.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18277997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913890 + ... + 913909.

It is an arithmetic number, because the mean of its divisors is an integer number (4112550).

Almost surely, 2^18277990 is an apocalyptic number.

18277990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18277990 is a deficient number, since it is larger than the sum of its proper divisors (14622410).

18277990 is a wasteful number, since it uses less digits than its factorization.

18277990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827806.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 18277990 is about 4275.2765992389. The cubic root of 18277990 is about 263.4164010045.

The spelling of 18277990 in words is "eighteen million, two hundred seventy-seven thousand, nine hundred ninety".