7878057 has 8 divisors (see below), whose sum is σ = 11459040. Its totient is φ = 4774560.

The previous prime is 7878047. The next prime is 7878071. The reversal of 7878057 is 7508787.

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

It is not a de Polignac number, because 7878057 - 2⁶ = 7877993 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7878007) 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, 119332 + ... + 119397.

It is an arithmetic number, because the mean of its divisors is an integer number (1432380).

Almost surely, 2^7878057 is an apocalyptic number.

It is an amenable number.

7878057 is a deficient number, since it is larger than the sum of its proper divisors (3580983).

7878057 is a wasteful number, since it uses less digits than its factorization.

7878057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238743.

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 7878057 is about 2806.7876656420. The cubic root of 7878057 is about 198.9786009329.

The spelling of 7878057 in words is "seven million, eight hundred seventy-eight thousand, fifty-seven".