57405307 has 4 divisors (see below), whose sum is σ = 58488480. Its totient is φ = 56322136.

The previous prime is 57405253. The next prime is 57405347. The reversal of 57405307 is 70350475.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57405307 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57405347) 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, 541507 + ... + 541612.

It is an arithmetic number, because the mean of its divisors is an integer number (14622120).

Almost surely, 2^57405307 is an apocalyptic number.

57405307 is a deficient number, since it is larger than the sum of its proper divisors (1083173).

57405307 is a wasteful number, since it uses less digits than its factorization.

57405307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083172.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 57405307 is about 7576.6289997597. The cubic root of 57405307 is about 385.7601376088.

The spelling of 57405307 in words is "fifty-seven million, four hundred five thousand, three hundred seven".