87770508 has 48 divisors (see below), whose sum is σ = 236893440. Its totient is φ = 24773184.

The previous prime is 87770503. The next prime is 87770531. The reversal of 87770508 is 80507778.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 87770508.

It is not an unprimeable number, because it can be changed into a prime (87770503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 678 + ... + 13266.

It is an arithmetic number, because the mean of its divisors is an integer number (4935280).

Almost surely, 2^87770508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87770508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118446720).

87770508 is an abundant number, since it is smaller than the sum of its proper divisors (149122932).

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

87770508 is a wasteful number, since it uses less digits than its factorization.

87770508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12686 (or 12684 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 87770508 is about 9368.5915697078. The cubic root of 87770508 is about 444.4090257238.

The spelling of 87770508 in words is "eighty-seven million, seven hundred seventy thousand, five hundred eight".