87451578 has 48 divisors (see below), whose sum is σ = 194313600. Its totient is φ = 28416960.

The previous prime is 87451577. The next prime is 87451583. The reversal of 87451578 is 87515478.

It is a happy number.

87451578 is a `hidden beast` number, since 8 + 74 + 5 + 1 + 578 = 666.

It is not an unprimeable number, because it can be changed into a prime (87451571) 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, 126213 + ... + 126903.

It is an arithmetic number, because the mean of its divisors is an integer number (4048200).

Almost surely, 2^87451578 is an apocalyptic number.

87451578 is an abundant number, since it is smaller than the sum of its proper divisors (106862022).

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

87451578 is a wasteful number, since it uses less digits than its factorization.

87451578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 864 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 87451578 is about 9351.5548439818. The cubic root of 87451578 is about 443.8700922601.

The spelling of 87451578 in words is "eighty-seven million, four hundred fifty-one thousand, five hundred seventy-eight".