87989500 has 24 divisors (see below), whose sum is σ = 192170160. Its totient is φ = 35195600.

The previous prime is 87989491. The next prime is 87989507. The reversal of 87989500 is 598978.

It is a super-2 number, since 2×87989500² = 15484304220500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87989507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87490 + ... + 88489.

It is an arithmetic number, because the mean of its divisors is an integer number (8007090).

Almost surely, 2^87989500 is an apocalyptic number.

It is an amenable number.

87989500 is an abundant number, since it is smaller than the sum of its proper divisors (104180660).

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

87989500 is a wasteful number, since it uses less digits than its factorization.

87989500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175998 (or 175986 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 87989500 is about 9380.2718510713. The cubic root of 87989500 is about 444.7783266595.

The spelling of 87989500 in words is "eighty-seven million, nine hundred eighty-nine thousand, five hundred".