57028191 has 16 divisors (see below), whose sum is σ = 84881280. Its totient is φ = 33757920.

The previous prime is 57028163. The next prime is 57028193. The reversal of 57028191 is 19182075.

It is not a de Polignac number, because 57028191 - 2¹³ = 57019999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57028193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18676 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (5305080).

Almost surely, 2^57028191 is an apocalyptic number.

57028191 is a deficient number, since it is larger than the sum of its proper divisors (27853089).

57028191 is a wasteful number, since it uses less digits than its factorization.

57028191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40246.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 57028191 is about 7551.7011990677. The cubic root of 57028191 is about 384.9135489254.

The spelling of 57028191 in words is "fifty-seven million, twenty-eight thousand, one hundred ninety-one".