18875390 has 8 divisors (see below), whose sum is σ = 33975720. Its totient is φ = 7550152.

The previous prime is 18875377. The next prime is 18875393. The reversal of 18875390 is 9357881.

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 (18875393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943760 + ... + 943779.

It is an arithmetic number, because the mean of its divisors is an integer number (4246965).

Almost surely, 2^18875390 is an apocalyptic number.

18875390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18875390 is a deficient number, since it is larger than the sum of its proper divisors (15100330).

18875390 is a wasteful number, since it uses less digits than its factorization.

18875390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887546.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18875390 is about 4344.5816829702. The cubic root of 18875390 is about 266.2555348684.

The spelling of 18875390 in words is "eighteen million, eight hundred seventy-five thousand, three hundred ninety".