57709340 has 48 divisors (see below), whose sum is σ = 131368608. Its totient is φ = 21168384.

The previous prime is 57709303. The next prime is 57709361. The reversal of 57709340 is 4390775.

It is a self number, because there is not a number n which added to its sum of digits gives 57709340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44339 + ... + 45621.

It is an arithmetic number, because the mean of its divisors is an integer number (2736846).

Almost surely, 2^57709340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57709340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65684304).

57709340 is an abundant number, since it is smaller than the sum of its proper divisors (73659268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57709340 is a wasteful number, since it uses less digits than its factorization.

57709340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478 (or 1476 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 57709340 is about 7596.6663741407. Note that the first 3 decimals coincide. The cubic root of 57709340 is about 386.4399665319.

The spelling of 57709340 in words is "fifty-seven million, seven hundred nine thousand, three hundred forty".