87819776 has 80 divisors (see below), whose sum is σ = 197987328. Its totient is φ = 38553600.

The previous prime is 87819749. The next prime is 87819779. The reversal of 87819776 is 67791878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87819779) 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, 174341 + ... + 174843.

Almost surely, 2^87819776 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 87819776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98993664).

87819776 is an abundant number, since it is smaller than the sum of its proper divisors (110167552).

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

87819776 is a wasteful number, since it uses less digits than its factorization.

87819776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 547 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 53.

The square root of 87819776 is about 9371.2206248706. The cubic root of 87819776 is about 444.4921631727.

The spelling of 87819776 in words is "eighty-seven million, eight hundred nineteen thousand, seven hundred seventy-six".