6459978 has 32 divisors (see below), whose sum is σ = 15168384. Its totient is φ = 1795392.

The previous prime is 6459923. The next prime is 6459979. The reversal of 6459978 is 8799546.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6459979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525 + ... + 3632.

It is an arithmetic number, because the mean of its divisors is an integer number (474012).

Almost surely, 2^6459978 is an apocalyptic number.

6459978 is an abundant number, since it is smaller than the sum of its proper divisors (8708406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6459978 is a wasteful number, since it uses less digits than its factorization.

6459978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its digits is 544320, while the sum is 48.

The square root of 6459978 is about 2541.6486775320. The cubic root of 6459978 is about 186.2417367924.

The spelling of 6459978 in words is "six million, four hundred fifty-nine thousand, nine hundred seventy-eight".