57047280 has 80 divisors (see below), whose sum is σ = 177738624. Its totient is φ = 15136000.

The previous prime is 57047279. The next prime is 57047281. The reversal of 57047280 is 8274075.

It is an interprime number because it is at equal distance from previous prime (57047279) and next prime (57047281).

It is a tau number, because it is divible by the number of its divisors (80).

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, 59767 + ... + 60713.

Almost surely, 2^57047280 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 57047280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88869312).

57047280 is an abundant number, since it is smaller than the sum of its proper divisors (120691344).

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

57047280 is a wasteful number, since it uses less digits than its factorization.

57047280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 57047280 is about 7552.9649807211. The cubic root of 57047280 is about 384.9564914008.

The spelling of 57047280 in words is "fifty-seven million, forty-seven thousand, two hundred eighty".