57640302 has 64 divisors (see below), whose sum is σ = 139371840. Its totient is φ = 17584128.

The previous prime is 57640249. The next prime is 57640307. The reversal of 57640302 is 20304675.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57640307) 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, 33118 + ... + 34814.

It is an arithmetic number, because the mean of its divisors is an integer number (2177685).

Almost surely, 2^57640302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57640302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69685920).

57640302 is an abundant number, since it is smaller than the sum of its proper divisors (81731538).

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

57640302 is a wasteful number, since it uses less digits than its factorization.

57640302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1756 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 57640302 is about 7592.1210475071. The cubic root of 57640302 is about 386.2858049568.

Adding to 57640302 its reverse (20304675), we get a palindrome (77944977).

The spelling of 57640302 in words is "fifty-seven million, six hundred forty thousand, three hundred two".