57861648 has 80 divisors (see below), whose sum is σ = 178877440. Its totient is φ = 17801856.

The previous prime is 57861647. The next prime is 57861649. The reversal of 57861648 is 84616875.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (57861647) and next prime (57861649).

It is not an unprimeable number, because it can be changed into a prime (57861647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465 + ... + 10767.

It is an arithmetic number, because the mean of its divisors is an integer number (2235968).

Almost surely, 2^57861648 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 57861648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89438720).

57861648 is an abundant number, since it is smaller than the sum of its proper divisors (121015792).

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

57861648 is a wasteful number, since it uses less digits than its factorization.

57861648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10333 (or 10321 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 57861648 is about 7606.6844288428. The cubic root of 57861648 is about 386.7796353760.

It can be divided in two parts, 578 and 61648, that added together give a palindrome (62226).

The spelling of 57861648 in words is "fifty-seven million, eight hundred sixty-one thousand, six hundred forty-eight".