57404381 has 8 divisors (see below), whose sum is σ = 58245120. Its totient is φ = 56569968.

The previous prime is 57404317. The next prime is 57404407. The reversal of 57404381 is 18340475.

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

It is a cyclic number.

It is not a de Polignac number, because 57404381 - 2⁶ = 57404317 is a prime.

It is a super-2 number, since 2×57404381² = 6590525915986322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57401381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18500 + ... + 21378.

It is an arithmetic number, because the mean of its divisors is an integer number (7280640).

Almost surely, 2^57404381 is an apocalyptic number.

It is an amenable number.

57404381 is a deficient number, since it is larger than the sum of its proper divisors (840739).

57404381 is a wasteful number, since it uses less digits than its factorization.

57404381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 57404381 is about 7576.5678905425. The cubic root of 57404381 is about 385.7580633766.

The spelling of 57404381 in words is "fifty-seven million, four hundred four thousand, three hundred eighty-one".