87128238 has 32 divisors (see below), whose sum is σ = 180986400. Its totient is φ = 27929216.

The previous prime is 87128233. The next prime is 87128263. The reversal of 87128238 is 83282178.

It is a junction number, because it is equal to n+sod(n) for n = 87128196 and 87128205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87128233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50128 + ... + 51836.

It is an arithmetic number, because the mean of its divisors is an integer number (5655825).

Almost surely, 2^87128238 is an apocalyptic number.

87128238 is an abundant number, since it is smaller than the sum of its proper divisors (93858162).

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

87128238 is a wasteful number, since it uses less digits than its factorization.

87128238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its digits is 43008, while the sum is 39.

The square root of 87128238 is about 9334.2508001446. The cubic root of 87128238 is about 443.3223674275.

The spelling of 87128238 in words is "eighty-seven million, one hundred twenty-eight thousand, two hundred thirty-eight".