18287948 has 24 divisors (see below), whose sum is σ = 36809472. Its totient is φ = 7787664.

The previous prime is 18287933. The next prime is 18287957. The reversal of 18287948 is 84978281.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2561 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (1533728).

Almost surely, 2^18287948 is an apocalyptic number.

It is an amenable number.

18287948 is an abundant number, since it is smaller than the sum of its proper divisors (18521524).

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

18287948 is a wasteful number, since it uses less digits than its factorization.

18287948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181 (or 4179 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 18287948 is about 4276.4410436717. The cubic root of 18287948 is about 263.4642294639.

The spelling of 18287948 in words is "eighteen million, two hundred eighty-seven thousand, nine hundred forty-eight".