434786978 has 16 divisors (see below), whose sum is σ = 664807416. Its totient is φ = 213217920.

The previous prime is 434786977. The next prime is 434786987. The reversal of 434786978 is 879687434.

It can be written as a sum of positive squares in 4 ways, for example, as 353552809 + 81234169 = 18803^2 + 9013^2 .

It is not an unprimeable number, because it can be changed into a prime (434786971) 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, 18200 + ... + 34652.

Almost surely, 2^434786978 is an apocalyptic number.

434786978 is a deficient number, since it is larger than the sum of its proper divisors (230020438).

434786978 is a wasteful number, since it uses less digits than its factorization.

434786978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16709.

The product of its digits is 8128512, while the sum is 56.

The square root of 434786978 is about 20851.5461776819. The cubic root of 434786978 is about 757.5747818716.

The spelling of 434786978 in words is "four hundred thirty-four million, seven hundred eighty-six thousand, nine hundred seventy-eight".