8978257 has 4 divisors (see below), whose sum is σ = 9368640. Its totient is φ = 8587876.

The previous prime is 8978243. The next prime is 8978273. The reversal of 8978257 is 7528798.

8978257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7528798 = 2 ⋅3764399.

It is a cyclic number.

It is not a de Polignac number, because 8978257 - 2⁷ = 8978129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8978237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195157 + ... + 195202.

It is an arithmetic number, because the mean of its divisors is an integer number (2342160).

Almost surely, 2^8978257 is an apocalyptic number.

It is an amenable number.

8978257 is a deficient number, since it is larger than the sum of its proper divisors (390383).

8978257 is a wasteful number, since it uses less digits than its factorization.

8978257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390382.

The product of its digits is 282240, while the sum is 46.

The square root of 8978257 is about 2996.3739753242. The cubic root of 8978257 is about 207.8407388501.

The spelling of 8978257 in words is "eight million, nine hundred seventy-eight thousand, two hundred fifty-seven".