1428638325 has 48 divisors (see below), whose sum is σ = 2400977280. Its totient is φ = 749479680.

The previous prime is 1428638297. The next prime is 1428638327. The reversal of 1428638325 is 5238368241.

It is not a de Polignac number, because 1428638325 - 2²⁴ = 1411861109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428638327) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1335891 + ... + 1336959.

It is an arithmetic number, because the mean of its divisors is an integer number (50020360).

Almost surely, 2^1428638325 is an apocalyptic number.

1428638325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428638325 is a deficient number, since it is larger than the sum of its proper divisors (972338955).

1428638325 is a wasteful number, since it uses less digits than its factorization.

1428638325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358 (or 1353 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 1428638325 is about 37797.3322471309. The cubic root of 1428638325 is about 1126.2654599601.

The spelling of 1428638325 in words is "one billion, four hundred twenty-eight million, six hundred thirty-eight thousand, three hundred twenty-five".