1428555238 has 8 divisors (see below), whose sum is σ = 2337635880. Its totient is φ = 649343280.

The previous prime is 1428555229. The next prime is 1428555257. The reversal of 1428555238 is 8325558241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1428555194 and 1428555203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32467143 + ... + 32467186.

It is an arithmetic number, because the mean of its divisors is an integer number (292204485).

Almost surely, 2^1428555238 is an apocalyptic number.

1428555238 is a deficient number, since it is larger than the sum of its proper divisors (909080642).

1428555238 is a wasteful number, since it uses less digits than its factorization.

1428555238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64934342.

The product of its digits is 384000, while the sum is 43.

The square root of 1428555238 is about 37796.2331191879. The cubic root of 1428555238 is about 1126.2436256883.

The spelling of 1428555238 in words is "one billion, four hundred twenty-eight million, five hundred fifty-five thousand, two hundred thirty-eight".