57780778 has 8 divisors (see below), whose sum is σ = 94550400. Its totient is φ = 26263980.

The previous prime is 57780769. The next prime is 57780781. The reversal of 57780778 is 87708775.

57780778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1313178 + ... + 1313221.

It is an arithmetic number, because the mean of its divisors is an integer number (11818800).

Almost surely, 2^57780778 is an apocalyptic number.

57780778 is a deficient number, since it is larger than the sum of its proper divisors (36769622).

57780778 is a wasteful number, since it uses less digits than its factorization.

57780778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626412.

The product of its (nonzero) digits is 768320, while the sum is 49.

The square root of 57780778 is about 7601.3668507710. The cubic root of 57780778 is about 386.5993579167.

The spelling of 57780778 in words is "fifty-seven million, seven hundred eighty thousand, seven hundred seventy-eight".