674109978 has 16 divisors (see below), whose sum is σ = 1352531136. Its totient is φ = 223984800.

The previous prime is 674109907. The next prime is 674109979. The reversal of 674109978 is 879901476.

It is a self number, because there is not a number n which added to its sum of digits gives 674109978.

It is not an unprimeable number, because it can be changed into a prime (674109979) 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, 177598 + ... + 181353.

It is an arithmetic number, because the mean of its divisors is an integer number (84533196).

Almost surely, 2^674109978 is an apocalyptic number.

674109978 is an abundant number, since it is smaller than the sum of its proper divisors (678421158).

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

674109978 is a wasteful number, since it uses less digits than its factorization.

674109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359269.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 674109978 is about 25963.6279822370. The cubic root of 674109978 is about 876.8196052015.

The spelling of 674109978 in words is "six hundred seventy-four million, one hundred nine thousand, nine hundred seventy-eight".