8453978 has 8 divisors (see below), whose sum is σ = 13656468. Its totient is φ = 3901824.

The previous prime is 8453971. The next prime is 8453983. The reversal of 8453978 is 8793548.

It can be written as a sum of positive squares in 2 ways, for example, as 8427409 + 26569 = 2903^2 + 163^2 .

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

It is not an unprimeable number, because it can be changed into a prime (8453971) 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, 162551 + ... + 162602.

Almost surely, 2^8453978 is an apocalyptic number.

8453978 is a deficient number, since it is larger than the sum of its proper divisors (5202490).

8453978 is a wasteful number, since it uses less digits than its factorization.

8453978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325168.

The product of its digits is 241920, while the sum is 44.

The square root of 8453978 is about 2907.5725270404. The cubic root of 8453978 is about 203.7137629862.

The spelling of 8453978 in words is "eight million, four hundred fifty-three thousand, nine hundred seventy-eight".