87418638 has 24 divisors (see below), whose sum is σ = 190116576. Its totient is φ = 29030400.

The previous prime is 87418633. The next prime is 87418651. The reversal of 87418638 is 83681478.

87418638 is a `hidden beast` number, since 8 + 7 + 4 + 1 + 8 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87418593 and 87418602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87418633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4083 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (7921524).

Almost surely, 2^87418638 is an apocalyptic number.

87418638 is an abundant number, since it is smaller than the sum of its proper divisors (102697938).

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

87418638 is a wasteful number, since it uses less digits than its factorization.

87418638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18200 (or 18197 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 87418638 is about 9349.7934736549. The cubic root of 87418638 is about 443.8143550650.

The spelling of 87418638 in words is "eighty-seven million, four hundred eighteen thousand, six hundred thirty-eight".