57978547 has 8 divisors (see below), whose sum is σ = 63468720. Its totient is φ = 52524960.

The previous prime is 57978539. The next prime is 57978563. The reversal of 57978547 is 74587975.

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 57978547 - 2³ = 57978539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57978494 and 57978503.

It is not an unprimeable number, because it can be changed into a prime (57978247) 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, 5772 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (7933590).

Almost surely, 2^57978547 is an apocalyptic number.

57978547 is a deficient number, since it is larger than the sum of its proper divisors (5490173).

57978547 is a wasteful number, since it uses less digits than its factorization.

57978547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18293.

The product of its digits is 2469600, while the sum is 52.

The square root of 57978547 is about 7614.3645171478. The cubic root of 57978547 is about 387.0399329380.

The spelling of 57978547 in words is "fifty-seven million, nine hundred seventy-eight thousand, five hundred forty-seven".