57109724 has 12 divisors (see below), whose sum is σ = 114219504. Its totient is φ = 24475584.

The previous prime is 57109721. The next prime is 57109751. The reversal of 57109724 is 42790175.

57109724 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57109721) 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, 1019789 + ... + 1019844.

It is an arithmetic number, because the mean of its divisors is an integer number (9518292).

Almost surely, 2^57109724 is an apocalyptic number.

It is an amenable number.

57109724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57109724 is a wasteful number, since it uses less digits than its factorization.

57109724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039644 (or 2039642 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 57109724 is about 7557.0975910067. The cubic root of 57109724 is about 385.0968980818.

Adding to 57109724 its reverse (42790175), we get a palindrome (99899899).

The spelling of 57109724 in words is "fifty-seven million, one hundred nine thousand, seven hundred twenty-four".