87000120 has 48 divisors (see below), whose sum is σ = 282751560. Its totient is φ = 23199936.

The previous prime is 87000119. The next prime is 87000127. The reversal of 87000120 is 2100078.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 87000093 and 87000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87000127) 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, 120474 + ... + 121193.

Almost surely, 2^87000120 is an apocalyptic number.

It is an amenable number.

87000120 is an abundant number, since it is smaller than the sum of its proper divisors (195751440).

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

87000120 is a wasteful number, since it uses less digits than its factorization.

87000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241684 (or 241677 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 87000120 is about 9327.3854857618. The cubic root of 87000120 is about 443.1049658956.

Adding to 87000120 its reverse (2100078), we get a palindrome (89100198).

The spelling of 87000120 in words is "eighty-seven million, one hundred twenty", and thus it is an aban number.