87667758 has 80 divisors (see below), whose sum is σ = 205272144. Its totient is φ = 27941760.

The previous prime is 87667751. The next prime is 87667771. The reversal of 87667758 is 85776678.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87667751) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 444916 + ... + 445112.

Almost surely, 2^87667758 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87667758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102636072).

87667758 is an abundant number, since it is smaller than the sum of its proper divisors (117604386).

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

87667758 is a wasteful number, since it uses less digits than its factorization.

87667758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 310 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 87667758 is about 9363.1062153540. The cubic root of 87667758 is about 444.2355397440.

The spelling of 87667758 in words is "eighty-seven million, six hundred sixty-seven thousand, seven hundred fifty-eight".