1428081188 has 24 divisors (see below), whose sum is σ = 2542934520. Its totient is φ = 701602560.

The previous prime is 1428081167. The next prime is 1428081199. The reversal of 1428081188 is 8811808241.

It can be written as a sum of positive squares in 4 ways, for example, as 264452644 + 1163628544 = 16262^2 + 34112^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69458 + ... + 87638.

It is an arithmetic number, because the mean of its divisors is an integer number (105955605).

Almost surely, 2^1428081188 is an apocalyptic number.

It is an amenable number.

1428081188 is a deficient number, since it is larger than the sum of its proper divisors (1114853332).

1428081188 is a wasteful number, since it uses less digits than its factorization.

1428081188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18527 (or 18525 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 41.

The square root of 1428081188 is about 37789.9614712691. The cubic root of 1428081188 is about 1126.1190348095.

The spelling of 1428081188 in words is "one billion, four hundred twenty-eight million, eighty-one thousand, one hundred eighty-eight".