87550785 has 48 divisors (see below), whose sum is σ = 177690240. Its totient is φ = 39041280.

The previous prime is 87550781. The next prime is 87550787. The reversal of 87550785 is 58705578.

It is a happy number.

It is not a de Polignac number, because 87550785 - 2² = 87550781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87550785.

It is not an unprimeable number, because it can be changed into a prime (87550781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9526 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (3701880).

Almost surely, 2^87550785 is an apocalyptic number.

It is an amenable number.

87550785 is an abundant number, since it is smaller than the sum of its proper divisors (90139455).

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

87550785 is a wasteful number, since it uses less digits than its factorization.

87550785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838 (or 6835 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 45.

The square root of 87550785 is about 9356.8576455988. The cubic root of 87550785 is about 444.0378741736.

The spelling of 87550785 in words is "eighty-seven million, five hundred fifty thousand, seven hundred eighty-five".