57645390 has 64 divisors (see below), whose sum is σ = 151683840. Its totient is φ = 13904640.

The previous prime is 57645361. The next prime is 57645391. The reversal of 57645390 is 9354675.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57645391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101026 + ... + 101594.

It is an arithmetic number, because the mean of its divisors is an integer number (2370060).

Almost surely, 2^57645390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57645390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75841920).

57645390 is an abundant number, since it is smaller than the sum of its proper divisors (94038450).

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

57645390 is a wasteful number, since it uses less digits than its factorization.

57645390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 57645390 is about 7592.4561243382. The cubic root of 57645390 is about 386.2971706407.

The spelling of 57645390 in words is "fifty-seven million, six hundred forty-five thousand, three hundred ninety".