18487008 has 48 divisors (see below), whose sum is σ = 53922960. Its totient is φ = 6162048.

The previous prime is 18487003. The next prime is 18487037. The reversal of 18487008 is 80078481.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18487003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9835 + ... + 11562.

It is an arithmetic number, because the mean of its divisors is an integer number (1123395).

Almost surely, 2^18487008 is an apocalyptic number.

18487008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18487008 is an abundant number, since it is smaller than the sum of its proper divisors (35435952).

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

18487008 is a wasteful number, since it uses less digits than its factorization.

18487008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21416 (or 21402 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 18487008 is about 4299.6520789478. The cubic root of 18487008 is about 264.4166973113.

The spelling of 18487008 in words is "eighteen million, four hundred eighty-seven thousand, eight".