87921870894 has 48 divisors (see below), whose sum is σ = 223801132464. Its totient is φ = 24593529600.

The previous prime is 87921870893. The next prime is 87921870899. The reversal of 87921870894 is 49807812978.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87921870893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17076267 + ... + 17081414.

It is an arithmetic number, because the mean of its divisors is an integer number (4662523593).

Almost surely, 2^87921870894 is an apocalyptic number.

87921870894 is an abundant number, since it is smaller than the sum of its proper divisors (135879261570).

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

87921870894 is a wasteful number, since it uses less digits than its factorization.

87921870894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34157713 (or 34157710 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 87921870894 in words is "eighty-seven billion, nine hundred twenty-one million, eight hundred seventy thousand, eight hundred ninety-four".