434439978 has 48 divisors (see below), whose sum is σ = 1063948320. Its totient is φ = 117591264.

The previous prime is 434439961. The next prime is 434439991. The reversal of 434439978 is 879934434.

It is a self number, because there is not a number n which added to its sum of digits gives 434439978.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33301 + ... + 44472.

It is an arithmetic number, because the mean of its divisors is an integer number (22165590).

Almost surely, 2^434439978 is an apocalyptic number.

434439978 is an abundant number, since it is smaller than the sum of its proper divisors (629508342).

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

434439978 is a wasteful number, since it uses less digits than its factorization.

434439978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77811 (or 77804 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The square root of 434439978 is about 20843.2237909590. The cubic root of 434439978 is about 757.3731901134.

The spelling of 434439978 in words is "four hundred thirty-four million, four hundred thirty-nine thousand, nine hundred seventy-eight".