87993238 has 4 divisors (see below), whose sum is σ = 131989860. Its totient is φ = 43996618.

The previous prime is 87993187. The next prime is 87993263. The reversal of 87993238 is 83239978.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 87993191 and 87993200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21998308 + ... + 21998311.

It is an arithmetic number, because the mean of its divisors is an integer number (32997465).

Almost surely, 2^87993238 is an apocalyptic number.

87993238 is a deficient number, since it is larger than the sum of its proper divisors (43996622).

87993238 is a wasteful number, since it uses less digits than its factorization.

87993238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43996621.

The product of its digits is 653184, while the sum is 49.

The square root of 87993238 is about 9380.4710969119. The cubic root of 87993238 is about 444.7846249786.

The spelling of 87993238 in words is "eighty-seven million, nine hundred ninety-three thousand, two hundred thirty-eight".