434208728 has 8 divisors (see below), whose sum is σ = 814141380. Its totient is φ = 217104360.

The previous prime is 434208703. The next prime is 434208739. The reversal of 434208728 is 827802434.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 434208691 and 434208700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27138038 + ... + 27138053.

Almost surely, 2^434208728 is an apocalyptic number.

It is an amenable number.

434208728 is a deficient number, since it is larger than the sum of its proper divisors (379932652).

434208728 is a wasteful number, since it uses less digits than its factorization.

434208728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54276097 (or 54276093 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 434208728 is about 20837.6756861220. The cubic root of 434208728 is about 757.2387844079.

The spelling of 434208728 in words is "four hundred thirty-four million, two hundred eight thousand, seven hundred twenty-eight".