57279775 has 72 divisors (see below), whose sum is σ = 91601280. Its totient is φ = 35259840.

The previous prime is 57279767. The next prime is 57279779. The reversal of 57279775 is 57797275.

It is a happy number.

57279775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57279775 - 2³ = 57279767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57279779) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 535272 + ... + 535378.

It is an arithmetic number, because the mean of its divisors is an integer number (1272240).

Almost surely, 2^57279775 is an apocalyptic number.

57279775 is a deficient number, since it is larger than the sum of its proper divisors (34321505).

57279775 is a wasteful number, since it uses less digits than its factorization.

57279775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 161 counting only the distinct ones).

The product of its digits is 1080450, while the sum is 49.

The square root of 57279775 is about 7568.3403068308. The cubic root of 57279775 is about 385.4787432842.

The spelling of 57279775 in words is "fifty-seven million, two hundred seventy-nine thousand, seven hundred seventy-five".