87557796 has 72 divisors (see below), whose sum is σ = 228907224. Its totient is φ = 28200960.

The previous prime is 87557791. The next prime is 87557797. The reversal of 87557796 is 69775578.

87557796 is a `hidden beast` number, since 87 + 557 + 7 + 9 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 396900 + 87160896 = 630^2 + 9336^2 .

It is not an unprimeable number, because it can be changed into a prime (87557791) 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, 201996 + ... + 202428.

It is an arithmetic number, because the mean of its divisors is an integer number (3179267).

Almost surely, 2^87557796 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 87557796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114453612).

87557796 is an abundant number, since it is smaller than the sum of its proper divisors (141349428).

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

87557796 is a wasteful number, since it uses less digits than its factorization.

87557796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 616 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The square root of 87557796 is about 9357.2322831059. The cubic root of 87557796 is about 444.0497265952.

The spelling of 87557796 in words is "eighty-seven million, five hundred fifty-seven thousand, seven hundred ninety-six".