57478281 has 8 divisors (see below), whose sum is σ = 87585984. Its totient is φ = 32844720.

The previous prime is 57478271. The next prime is 57478297. The reversal of 57478281 is 18287475.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57478281 - 2⁶ = 57478217 is a prime.

It is a super-2 number, since 2×57478281² = 6607505573429922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57478231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368510 + ... + 1368551.

It is an arithmetic number, because the mean of its divisors is an integer number (10948248).

Almost surely, 2^57478281 is an apocalyptic number.

It is an amenable number.

57478281 is a deficient number, since it is larger than the sum of its proper divisors (30107703).

57478281 is a wasteful number, since it uses less digits than its factorization.

57478281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737071.

The product of its digits is 125440, while the sum is 42.

The square root of 57478281 is about 7581.4432003412. The cubic root of 57478281 is about 385.9235286599.

It can be divided in two parts, 5747 and 8281, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 57478281 in words is "fifty-seven million, four hundred seventy-eight thousand, two hundred eighty-one".