57047284 has 48 divisors (see below), whose sum is σ = 118444032. Its totient is φ = 23535072.

The previous prime is 57047281. The next prime is 57047297. The reversal of 57047284 is 48274075.

It is a super-2 number, since 2×57047284² = 6508785223553312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57047281) 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, 87849 + ... + 88495.

It is an arithmetic number, because the mean of its divisors is an integer number (2467584).

Almost surely, 2^57047284 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 57047284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59222016).

57047284 is an abundant number, since it is smaller than the sum of its proper divisors (61396748).

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

57047284 is a wasteful number, since it uses less digits than its factorization.

57047284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 57047284 is about 7552.9652455178. The cubic root of 57047284 is about 384.9565003982.

The spelling of 57047284 in words is "fifty-seven million, forty-seven thousand, two hundred eighty-four".