57780878 has 4 divisors (see below), whose sum is σ = 86671320. Its totient is φ = 28890438.

The previous prime is 57780857. The next prime is 57780889. The reversal of 57780878 is 87808775.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14445218 + ... + 14445221.

It is an arithmetic number, because the mean of its divisors is an integer number (21667830).

Almost surely, 2^57780878 is an apocalyptic number.

57780878 is a deficient number, since it is larger than the sum of its proper divisors (28890442).

57780878 is a wasteful number, since it uses less digits than its factorization.

57780878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28890441.

The product of its (nonzero) digits is 878080, while the sum is 50.

The square root of 57780878 is about 7601.3734285325. The cubic root of 57780878 is about 386.5995809430.

The spelling of 57780878 in words is "fifty-seven million, seven hundred eighty thousand, eight hundred seventy-eight".