57381500 has 48 divisors (see below), whose sum is σ = 136727136. Its totient is φ = 20864000.

The previous prime is 57381461. The next prime is 57381559. The reversal of 57381500 is 518375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (2848482).

Almost surely, 2^57381500 is an apocalyptic number.

57381500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57381500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68363568).

57381500 is an abundant number, since it is smaller than the sum of its proper divisors (79345636).

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

57381500 is a wasteful number, since it uses less digits than its factorization.

57381500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10463 (or 10451 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 57381500 is about 7575.0577555554. The cubic root of 57381500 is about 385.7068030425.

Adding to 57381500 its reverse (518375), we get a palindrome (57899875).

The spelling of 57381500 in words is "fifty-seven million, three hundred eighty-one thousand, five hundred".