56001578 has 4 divisors (see below), whose sum is σ = 84002370. Its totient is φ = 28000788.

The previous prime is 56001577. The next prime is 56001601. The reversal of 56001578 is 87510065.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87510065 = 5 ⋅17502013.

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 3829849 = 7223^2 + 1957^2 .

It is not an unprimeable number, because it can be changed into a prime (56001577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000393 + ... + 14000396.

Almost surely, 2^56001578 is an apocalyptic number.

56001578 is a deficient number, since it is larger than the sum of its proper divisors (28000792).

56001578 is a wasteful number, since it uses less digits than its factorization.

56001578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28000791.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 56001578 is about 7483.4202073651. The cubic root of 56001578 is about 382.5898300986.

The spelling of 56001578 in words is "fifty-six million, one thousand, five hundred seventy-eight".