87007578 has 32 divisors (see below), whose sum is σ = 199167360. Its totient is φ = 24822720.

The previous prime is 87007549. The next prime is 87007579. The reversal of 87007578 is 87570078.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87007579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41868 + ... + 43896.

It is an arithmetic number, because the mean of its divisors is an integer number (6223980).

Almost surely, 2^87007578 is an apocalyptic number.

87007578 is an abundant number, since it is smaller than the sum of its proper divisors (112159782).

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

87007578 is a wasteful number, since it uses less digits than its factorization.

87007578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062.

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 87007578 is about 9327.7852676828. The cubic root of 87007578 is about 443.1176271134.

Subtracting 87007578 from its reverse (87570078), we obtain a square (562500 = 750²).

The spelling of 87007578 in words is "eighty-seven million, seven thousand, five hundred seventy-eight".