87391789002 has 96 divisors (see below), whose sum is σ = 230717687040. Its totient is φ = 24437790720.

The previous prime is 87391788997. The next prime is 87391789003. The reversal of 87391789002 is 20098719378.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 87391789002.

It is not an unprimeable number, because it can be changed into a prime (87391789003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226999 + ... + 475722.

It is an arithmetic number, because the mean of its divisors is an integer number (2403309240).

Almost surely, 2^87391789002 is an apocalyptic number.

87391789002 is an abundant number, since it is smaller than the sum of its proper divisors (143325898038).

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

87391789002 is a wasteful number, since it uses less digits than its factorization.

87391789002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702793 (or 702780 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 87391789002 in words is "eighty-seven billion, three hundred ninety-one million, seven hundred eighty-nine thousand, two".