7678057 has 8 divisors (see below), whose sum is σ = 7864776. Its totient is φ = 7492992.

The previous prime is 7678051. The next prime is 7678087. The reversal of 7678057 is 7508767.

It can be written as a sum of positive squares in 4 ways, for example, as 1382976 + 6295081 = 1176^2 + 2509^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7678057 - 2¹⁵ = 7645289 is a prime.

It is a super-3 number, since 3×7678057³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7678051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16573 + ... + 17029.

It is an arithmetic number, because the mean of its divisors is an integer number (983097).

Almost surely, 2^7678057 is an apocalyptic number.

It is an amenable number.

7678057 is a deficient number, since it is larger than the sum of its proper divisors (186719).

7678057 is a wasteful number, since it uses less digits than its factorization.

7678057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 7678057 is about 2770.9307100684. The cubic root of 7678057 is about 197.2803261748.

The spelling of 7678057 in words is "seven million, six hundred seventy-eight thousand, fifty-seven".