1428638363 has 4 divisors (see below), whose sum is σ = 1431572400. Its totient is φ = 1425704328.

The previous prime is 1428638359. The next prime is 1428638369. The reversal of 1428638363 is 3638368241.

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

It is a cyclic number.

It is not a de Polignac number, because 1428638363 - 2² = 1428638359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428638369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1466288 + ... + 1467261.

It is an arithmetic number, because the mean of its divisors is an integer number (357893100).

Almost surely, 2^1428638363 is an apocalyptic number.

1428638363 is a deficient number, since it is larger than the sum of its proper divisors (2934037).

1428638363 is an equidigital number, since it uses as much as digits as its factorization.

1428638363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934036.

The product of its digits is 497664, while the sum is 44.

The square root of 1428638363 is about 37797.3327498119. The cubic root of 1428638363 is about 1126.2654699458.

The spelling of 1428638363 in words is "one billion, four hundred twenty-eight million, six hundred thirty-eight thousand, three hundred sixty-three".