57051640 has 16 divisors (see below), whose sum is σ = 128366280. Its totient is φ = 22820640.

The previous prime is 57051629. The next prime is 57051649. The reversal of 57051640 is 4615075.

It is a junction number, because it is equal to n+sod(n) for n = 57051599 and 57051608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57051649) 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, 713106 + ... + 713185.

Almost surely, 2^57051640 is an apocalyptic number.

It is an amenable number.

57051640 is an abundant number, since it is smaller than the sum of its proper divisors (71314640).

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

57051640 is a wasteful number, since it uses less digits than its factorization.

57051640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426302 (or 1426298 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57051640 is about 7553.2536035804. The cubic root of 57051640 is about 384.9662982812.

The spelling of 57051640 in words is "fifty-seven million, fifty-one thousand, six hundred forty".