87933978 has 64 divisors (see below), whose sum is σ = 218989440. Its totient is φ = 25920000.

The previous prime is 87933977. The next prime is 87933983.

87933978 is nontrivially palindromic in base 10.

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

It is not an unprimeable number, because it can be changed into a prime (87933977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19978 + ... + 23978.

It is an arithmetic number, because the mean of its divisors is an integer number (3421710).

Almost surely, 2^87933978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87933978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109494720).

87933978 is an abundant number, since it is smaller than the sum of its proper divisors (131055462).

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

87933978 is a wasteful number, since it uses less digits than its factorization.

87933978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060 (or 4054 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 87933978 is about 9377.3118749458. The cubic root of 87933978 is about 444.6847542131.

The spelling of 87933978 in words is "eighty-seven million, nine hundred thirty-three thousand, nine hundred seventy-eight".