57898638 has 128 divisors (see below), whose sum is σ = 156180480. Its totient is φ = 15746400.

The previous prime is 57898637. The next prime is 57898639. The reversal of 57898638 is 83689875.

It is a happy number.

57898638 is a `hidden beast` number, since 578 + 9 + 8 + 63 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (57898637) and next prime (57898639).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57898637) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 949128 + ... + 949188.

It is an arithmetic number, because the mean of its divisors is an integer number (1220160).

Almost surely, 2^57898638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57898638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78090240).

57898638 is an abundant number, since it is smaller than the sum of its proper divisors (98281842).

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

57898638 is an equidigital number, since it uses as much as digits as its factorization.

57898638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 104 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 57898638 is about 7609.1154545059. The cubic root of 57898638 is about 386.8620384389.

The spelling of 57898638 in words is "fifty-seven million, eight hundred ninety-eight thousand, six hundred thirty-eight".