2078657 has 8 divisors (see below), whose sum is σ = 2500800. Its totient is φ = 1687824.

The previous prime is 2078651. The next prime is 2078677. The reversal of 2078657 is 7568702.

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 2078657 - 2¹⁴ = 2062273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2078651) 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, 7682 + ... + 7947.

It is an arithmetic number, because the mean of its divisors is an integer number (312600).

2^2078657 is an apocalyptic number.

It is an amenable number.

2078657 is a deficient number, since it is larger than the sum of its proper divisors (422143).

2078657 is a wasteful number, since it uses less digits than its factorization.

2078657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15655.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2078657 is about 1441.7548335275. The cubic root of 2078657 is about 127.6226066542.

The spelling of 2078657 in words is "two million, seventy-eight thousand, six hundred fifty-seven".