478673778 has 16 divisors (see below), whose sum is σ = 1044379296. Its totient is φ = 145052640.

The previous prime is 478673633. The next prime is 478673791. The reversal of 478673778 is 877376874.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3626251 + ... + 3626382.

It is an arithmetic number, because the mean of its divisors is an integer number (65273706).

Almost surely, 2^478673778 is an apocalyptic number.

478673778 is an abundant number, since it is smaller than the sum of its proper divisors (565705518).

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

478673778 is a wasteful number, since it uses less digits than its factorization.

478673778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7252649.

The product of its digits is 11063808, while the sum is 57.

The square root of 478673778 is about 21878.6146270736. The cubic root of 478673778 is about 782.2517542479.

The spelling of 478673778 in words is "four hundred seventy-eight million, six hundred seventy-three thousand, seven hundred seventy-eight".