57081385 has 16 divisors (see below), whose sum is σ = 71354880. Its totient is φ = 43787520.

The previous prime is 57081361. The next prime is 57081391. The reversal of 57081385 is 58318075.

It is not a de Polignac number, because 57081385 - 2¹³ = 57073193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15886 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (4459680).

Almost surely, 2^57081385 is an apocalyptic number.

It is an amenable number.

57081385 is a deficient number, since it is larger than the sum of its proper divisors (14273495).

57081385 is a wasteful number, since it uses less digits than its factorization.

57081385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3408.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 57081385 is about 7555.2223660194. Note that the first 3 decimals coincide. The cubic root of 57081385 is about 385.0331899199.

The spelling of 57081385 in words is "fifty-seven million, eighty-one thousand, three hundred eighty-five".