203986434 has 16 divisors (see below), whose sum is σ = 431971488. Its totient is φ = 63995712.

The previous prime is 203986429. The next prime is 203986459. The reversal of 203986434 is 434689302.

It is a super-2 number, since 2×203986434² = 83220930512072712, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 203986392 and 203986401.

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, 999832 + ... + 1000035.

It is an arithmetic number, because the mean of its divisors is an integer number (26998218).

Almost surely, 2^203986434 is an apocalyptic number.

203986434 is an abundant number, since it is smaller than the sum of its proper divisors (227985054).

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

203986434 is a wasteful number, since it uses less digits than its factorization.

203986434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999889.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 203986434 is about 14282.3819441996. The cubic root of 203986434 is about 588.6634824026.

The spelling of 203986434 in words is "two hundred three million, nine hundred eighty-six thousand, four hundred thirty-four".