1428188925 has 12 divisors (see below), whose sum is σ = 2361272480. Its totient is φ = 761700720.

The previous prime is 1428188893. The next prime is 1428188929. The reversal of 1428188925 is 5298818241.

It is not a de Polignac number, because 1428188925 - 2⁵ = 1428188893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428188929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9521185 + ... + 9521334.

Almost surely, 2^1428188925 is an apocalyptic number.

1428188925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428188925 is a deficient number, since it is larger than the sum of its proper divisors (933083555).

1428188925 is a wasteful number, since it uses less digits than its factorization.

1428188925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19042532 (or 19042527 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The square root of 1428188925 is about 37791.3869155394. The cubic root of 1428188925 is about 1126.1473529090.

The spelling of 1428188925 in words is "one billion, four hundred twenty-eight million, one hundred eighty-eight thousand, nine hundred twenty-five".