57279409 has 16 divisors (see below), whose sum is σ = 66617856. Its totient is φ = 48672000.

The previous prime is 57279371. The next prime is 57279451. The reversal of 57279409 is 90497275.

It is a cyclic number.

It is not a de Polignac number, because 57279409 - 2¹¹ = 57277361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57279109) 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, 28384 + ... + 30334.

It is an arithmetic number, because the mean of its divisors is an integer number (4163616).

Almost surely, 2^57279409 is an apocalyptic number.

It is an amenable number.

57279409 is a deficient number, since it is larger than the sum of its proper divisors (9338447).

57279409 is a wasteful number, since it uses less digits than its factorization.

57279409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 57279409 is about 7568.3161271184. The cubic root of 57279409 is about 385.4779222526.

The spelling of 57279409 in words is "fifty-seven million, two hundred seventy-nine thousand, four hundred nine".