312648978 has 16 divisors (see below), whose sum is σ = 633214080. Its totient is φ = 102896976.

The previous prime is 312648977. The next prime is 312649019. The reversal of 312648978 is 879846213.

It is not an unprimeable number, because it can be changed into a prime (312648977) 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, 329325 + ... + 330272.

It is an arithmetic number, because the mean of its divisors is an integer number (39575880).

Almost surely, 2^312648978 is an apocalyptic number.

312648978 is an abundant number, since it is smaller than the sum of its proper divisors (320565102).

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

312648978 is a wasteful number, since it uses less digits than its factorization.

312648978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659681.

The product of its digits is 580608, while the sum is 48.

The square root of 312648978 is about 17681.8827617423. The cubic root of 312648978 is about 678.7122239523.

The spelling of 312648978 in words is "three hundred twelve million, six hundred forty-eight thousand, nine hundred seventy-eight".