878857407 has 12 divisors (see below), whose sum is σ = 1336274680. Its totient is φ = 555067728.

The previous prime is 878857391. The next prime is 878857423. The reversal of 878857407 is 704758878.

It is an interprime number because it is at equal distance from previous prime (878857391) and next prime (878857423).

It is not a de Polignac number, because 878857407 - 2⁴ = 878857391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878857477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2569588 + ... + 2569929.

Almost surely, 2^878857407 is an apocalyptic number.

878857407 is a deficient number, since it is larger than the sum of its proper divisors (457417273).

878857407 is a wasteful number, since it uses less digits than its factorization.

878857407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139542 (or 5139539 counting only the distinct ones).

The product of its (nonzero) digits is 3512320, while the sum is 54.

The square root of 878857407 is about 29645.5292919523. The cubic root of 878857407 is about 957.8690461151.

The spelling of 878857407 in words is "eight hundred seventy-eight million, eight hundred fifty-seven thousand, four hundred seven".