87778328 has 64 divisors (see below), whose sum is σ = 193190400. Its totient is φ = 36961920.

The previous prime is 87778289. The next prime is 87778337. The reversal of 87778328 is 82387778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78026 + ... + 79142.

It is an arithmetic number, because the mean of its divisors is an integer number (3018600).

Almost surely, 2^87778328 is an apocalyptic number.

87778328 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87778328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96595200).

87778328 is an abundant number, since it is smaller than the sum of its proper divisors (105412072).

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

87778328 is a wasteful number, since it uses less digits than its factorization.

87778328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1196 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 50.

The square root of 87778328 is about 9369.0089123663. The cubic root of 87778328 is about 444.4222236854.

The spelling of 87778328 in words is "eighty-seven million, seven hundred seventy-eight thousand, three hundred twenty-eight".