423478978 has 8 divisors (see below), whose sum is σ = 684081468. Its totient is φ = 195451824.

The previous prime is 423478943. The next prime is 423478981. The reversal of 423478978 is 879874324.

It can be written as a sum of positive squares in 2 ways, for example, as 423412929 + 66049 = 20577^2 + 257^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8143801 + ... + 8143852.

Almost surely, 2^423478978 is an apocalyptic number.

423478978 is a deficient number, since it is larger than the sum of its proper divisors (260602490).

423478978 is a wasteful number, since it uses less digits than its factorization.

423478978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16287668.

The product of its digits is 2709504, while the sum is 52.

The square root of 423478978 is about 20578.6048603884. The cubic root of 423478978 is about 750.9493034053.

The spelling of 423478978 in words is "four hundred twenty-three million, four hundred seventy-eight thousand, nine hundred seventy-eight".