87775000 has 48 divisors (see below), whose sum is σ = 205768080. Its totient is φ = 35100000.

The previous prime is 87774983. The next prime is 87775001. The reversal of 87775000 is 57778.

It is a happy number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87775001) 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, 23245 + ... + 26755.

It is an arithmetic number, because the mean of its divisors is an integer number (4286835).

Almost surely, 2^87775000 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 87775000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102884040).

87775000 is an abundant number, since it is smaller than the sum of its proper divisors (117993080).

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

87775000 is an equidigital number, since it uses as much as digits as its factorization.

87775000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3542 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 87775000 is about 9368.8313038500. The cubic root of 87775000 is about 444.4166070528.

The spelling of 87775000 in words is "eighty-seven million, seven hundred seventy-five thousand".