478135778 has 8 divisors (see below), whose sum is σ = 759392172. Its totient is φ = 225005056.

The previous prime is 478135771. The next prime is 478135781. The reversal of 478135778 is 877531874.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 477553609 + 582169 = 21853^2 + 763^2 .

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

It is a super-2 number, since 2×478135778² = 457227644407330568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478135771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7031375 + ... + 7031442.

Almost surely, 2^478135778 is an apocalyptic number.

478135778 is a deficient number, since it is larger than the sum of its proper divisors (281256394).

478135778 is a wasteful number, since it uses less digits than its factorization.

478135778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14062836.

The product of its digits is 1317120, while the sum is 50.

The square root of 478135778 is about 21866.3160591811. The cubic root of 478135778 is about 781.9585767005.

The spelling of 478135778 in words is "four hundred seventy-eight million, one hundred thirty-five thousand, seven hundred seventy-eight".