57748891 has 4 divisors (see below), whose sum is σ = 57843712. Its totient is φ = 57654072.

The previous prime is 57748879. The next prime is 57748931. The reversal of 57748891 is 19884775.

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

It is a cyclic number.

It is not a de Polignac number, because 57748891 - 2¹³ = 57740699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57748291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46491 + ... + 47716.

It is an arithmetic number, because the mean of its divisors is an integer number (14460928).

Almost surely, 2^57748891 is an apocalyptic number.

57748891 is a deficient number, since it is larger than the sum of its proper divisors (94821).

57748891 is an equidigital number, since it uses as much as digits as its factorization.

57748891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94820.

The product of its digits is 564480, while the sum is 49.

The square root of 57748891 is about 7599.2691095921. The cubic root of 57748891 is about 386.5282283672.

The spelling of 57748891 in words is "fifty-seven million, seven hundred forty-eight thousand, eight hundred ninety-one".