87445000 has 40 divisors (see below), whose sum is σ = 204895350. Its totient is φ = 34976000.

The previous prime is 87444979. The next prime is 87445003. The reversal of 87445000 is 54478.

It can be written as a sum of positive squares in 5 ways, for example, as 6120676 + 81324324 = 2474^2 + 9018^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 87445000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87445003) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 3745 + ... + 13744.

Almost surely, 2^87445000 is an apocalyptic number.

It is an amenable number.

87445000 is an abundant number, since it is smaller than the sum of its proper divisors (117450350).

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

87445000 is a wasteful number, since it uses less digits than its factorization.

87445000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17515 (or 17496 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 87445000 is about 9351.2031311484. The cubic root of 87445000 is about 443.8589628604.

Adding to 87445000 its reverse (54478), we get a palindrome (87499478).

The spelling of 87445000 in words is "eighty-seven million, four hundred forty-five thousand".