57878407 has 2 divisors, whose sum is σ = 57878408. Its totient is φ = 57878406.

The previous prime is 57878399. The next prime is 57878423. The reversal of 57878407 is 70487875.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57878407 - 2³ = 57878399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57878437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28939203 + 28939204.

It is an arithmetic number, because the mean of its divisors is an integer number (28939204).

Almost surely, 2^57878407 is an apocalyptic number.

57878407 is a deficient number, since it is larger than the sum of its proper divisors (1).

57878407 is an equidigital number, since it uses as much as digits as its factorization.

57878407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 57878407 is about 7607.7859459898. The cubic root of 57878407 is about 386.8169739495.

It can be divided in two parts, 57878 and 407, that added together give a palindrome (58285).

The spelling of 57878407 in words is "fifty-seven million, eight hundred seventy-eight thousand, four hundred seven".