87904278 has 160 divisors (see below), whose sum is σ = 255087360. Its totient is φ = 22044960.

The previous prime is 87904273. The next prime is 87904301. The reversal of 87904278 is 87240978.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87904273) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3031168 + ... + 3031196.

It is an arithmetic number, because the mean of its divisors is an integer number (1594296).

Almost surely, 2^87904278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87904278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127543680).

87904278 is an abundant number, since it is smaller than the sum of its proper divisors (167183082).

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

87904278 is an equidigital number, since it uses as much as digits as its factorization.

87904278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87904278 is about 9375.7281317240. The cubic root of 87904278 is about 444.6346839797.

The spelling of 87904278 in words is "eighty-seven million, nine hundred four thousand, two hundred seventy-eight".