57280345 has 8 divisors (see below), whose sum is σ = 72354240. Its totient is φ = 43412400.

The previous prime is 57280339. The next prime is 57280387. The reversal of 57280345 is 54308275.

57280345 = T₂₄₄₆ + T₂₄₄₇ + ... + T₂₄₆₄.

It is a happy number.

57280345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 57280345 - 2⁵ = 57280313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57280345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301381 + ... + 301570.

It is an arithmetic number, because the mean of its divisors is an integer number (9044280).

Almost surely, 2^57280345 is an apocalyptic number.

It is an amenable number.

57280345 is a deficient number, since it is larger than the sum of its proper divisors (15073895).

57280345 is a wasteful number, since it uses less digits than its factorization.

57280345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602975.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 57280345 is about 7568.3779636062. The cubic root of 57280345 is about 385.4800219330.

The spelling of 57280345 in words is "fifty-seven million, two hundred eighty thousand, three hundred forty-five".