87479937820 has 96 divisors (see below), whose sum is σ = 212376427200. Its totient is φ = 29964748800.

The previous prime is 87479937803. The next prime is 87479937829. The reversal of 87479937820 is 2873997478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87479937829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94366 + ... + 428794.

It is an arithmetic number, because the mean of its divisors is an integer number (2212254450).

Almost surely, 2^87479937820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87479937820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106188213600).

87479937820 is an abundant number, since it is smaller than the sum of its proper divisors (124896489380).

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

87479937820 is a wasteful number, since it uses less digits than its factorization.

87479937820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334519 (or 334517 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 64.

The spelling of 87479937820 in words is "eighty-seven billion, four hundred seventy-nine million, nine hundred thirty-seven thousand, eight hundred twenty".