57878071 has 4 divisors (see below), whose sum is σ = 58294600. Its totient is φ = 57461544.

The previous prime is 57878059. The next prime is 57878077. The reversal of 57878071 is 17087875.

It is a happy number.

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 57878071 - 2⁹ = 57877559 is a prime.

It is a super-2 number, since 2×57878071² = 6699742205362082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57878077) 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, 208056 + ... + 208333.

It is an arithmetic number, because the mean of its divisors is an integer number (14573650).

Almost surely, 2^57878071 is an apocalyptic number.

57878071 is a deficient number, since it is larger than the sum of its proper divisors (416529).

57878071 is a wasteful number, since it uses less digits than its factorization.

57878071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416528.

The product of its (nonzero) digits is 109760, while the sum is 43.

The square root of 57878071 is about 7607.7638633175. The cubic root of 57878071 is about 386.8162254219.

The spelling of 57878071 in words is "fifty-seven million, eight hundred seventy-eight thousand, seventy-one".