87112205840 has 40 divisors (see below), whose sum is σ = 220948233408. Its totient is φ = 31677165440.

The previous prime is 87112205837. The next prime is 87112205849. The reversal of 87112205840 is 4850221178.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 87112205794 and 87112205803.

It is not an unprimeable number, because it can be changed into a prime (87112205849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49494692 + ... + 49496451.

Almost surely, 2^87112205840 is an apocalyptic number.

87112205840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87112205840 is an abundant number, since it is smaller than the sum of its proper divisors (133836027568).

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

87112205840 is a wasteful number, since it uses less digits than its factorization.

87112205840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98991167 (or 98991161 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 87112205840 in words is "eighty-seven billion, one hundred twelve million, two hundred five thousand, eight hundred forty".