425519638 has 4 divisors (see below), whose sum is σ = 638279460. Its totient is φ = 212759818.

The previous prime is 425519629. The next prime is 425519641. The reversal of 425519638 is 836915524.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 425519594 and 425519603.

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, 106379908 + ... + 106379911.

It is an arithmetic number, because the mean of its divisors is an integer number (159569865).

Almost surely, 2^425519638 is an apocalyptic number.

425519638 is a deficient number, since it is larger than the sum of its proper divisors (212759822).

425519638 is a wasteful number, since it uses less digits than its factorization.

425519638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212759821.

The product of its digits is 259200, while the sum is 43.

The square root of 425519638 is about 20628.1273507801. The cubic root of 425519638 is about 752.1535955971.

The spelling of 425519638 in words is "four hundred twenty-five million, five hundred nineteen thousand, six hundred thirty-eight".