57978067 has 4 divisors (see below), whose sum is σ = 66260656. Its totient is φ = 49695480.

The previous prime is 57978049. The next prime is 57978077. The reversal of 57978067 is 76087975.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57978067 - 2¹¹ = 57976019 is a prime.

It is a super-2 number, since 2×57978067² = 6722912506112978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57978067.

It is not an unprimeable number, because it can be changed into a prime (57978077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4141284 + ... + 4141297.

It is an arithmetic number, because the mean of its divisors is an integer number (16565164).

Almost surely, 2^57978067 is an apocalyptic number.

57978067 is a deficient number, since it is larger than the sum of its proper divisors (8282589).

57978067 is an equidigital number, since it uses as much as digits as its factorization.

57978067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8282588.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 57978067 is about 7614.3329977090. The cubic root of 57978067 is about 387.0388648436.

The spelling of 57978067 in words is "fifty-seven million, nine hundred seventy-eight thousand, sixty-seven".