57878247 has 8 divisors (see below), whose sum is σ = 88195456. Its totient is φ = 33073272.

The previous prime is 57878243. The next prime is 57878257. The reversal of 57878247 is 74287875.

It is a happy number.

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

It is not a de Polignac number, because 57878247 - 2² = 57878243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57878196 and 57878205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57878243) 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, 1378033 + ... + 1378074.

It is an arithmetic number, because the mean of its divisors is an integer number (11024432).

Almost surely, 2^57878247 is an apocalyptic number.

57878247 is a deficient number, since it is larger than the sum of its proper divisors (30317209).

57878247 is a wasteful number, since it uses less digits than its factorization.

57878247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756117.

The product of its digits is 878080, while the sum is 48.

The square root of 57878247 is about 7607.7754304396. The cubic root of 57878247 is about 386.8166175082.

The spelling of 57878247 in words is "fifty-seven million, eight hundred seventy-eight thousand, two hundred forty-seven".