87632878 has 4 divisors (see below), whose sum is σ = 131449320. Its totient is φ = 43816438.

The previous prime is 87632869. The next prime is 87632879. The reversal of 87632878 is 87823678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87823678 = 2 ⋅43911839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87632879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21908218 + ... + 21908221.

It is an arithmetic number, because the mean of its divisors is an integer number (32862330).

Almost surely, 2^87632878 is an apocalyptic number.

87632878 is a deficient number, since it is larger than the sum of its proper divisors (43816442).

87632878 is a wasteful number, since it uses less digits than its factorization.

87632878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43816441.

The product of its digits is 903168, while the sum is 49.

The square root of 87632878 is about 9361.2434003181. The cubic root of 87632878 is about 444.1766165572.

The spelling of 87632878 in words is "eighty-seven million, six hundred thirty-two thousand, eight hundred seventy-eight".