57744649 has 4 divisors (see below), whose sum is σ = 57764164. Its totient is φ = 57725136.

The previous prime is 57744641. The next prime is 57744683. The reversal of 57744649 is 94644775.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33143049 + 24601600 = 5757^2 + 4960^2 .

It is a cyclic number.

It is not a de Polignac number, because 57744649 - 2³ = 57744641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57744599 and 57744608.

It is not an unprimeable number, because it can be changed into a prime (57744641) 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, 4302 + ... + 11575.

It is an arithmetic number, because the mean of its divisors is an integer number (14441041).

Almost surely, 2^57744649 is an apocalyptic number.

It is an amenable number.

57744649 is a deficient number, since it is larger than the sum of its proper divisors (19515).

57744649 is a wasteful number, since it uses less digits than its factorization.

57744649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19514.

The product of its digits is 846720, while the sum is 46.

The square root of 57744649 is about 7598.9899986775. The cubic root of 57744649 is about 386.5187638687.

The spelling of 57744649 in words is "fifty-seven million, seven hundred forty-four thousand, six hundred forty-nine".