1386825988 has 6 divisors (see below), whose sum is σ = 2426945486. Its totient is φ = 693412992.

The previous prime is 1386825959. The next prime is 1386825991. The reversal of 1386825988 is 8895286831.

It can be written as a sum of positive squares in only one way, i.e., 1256135364 + 130690624 = 35442^2 + 11432^2 .

It is a super-2 number, since 2×1386825988² = 3846572641984352288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173353245 + ... + 173353252.

Almost surely, 2^1386825988 is an apocalyptic number.

It is an amenable number.

1386825988 is a deficient number, since it is larger than the sum of its proper divisors (1040119498).

1386825988 is a wasteful number, since it uses less digits than its factorization.

1386825988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346706501 (or 346706499 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 58.

The square root of 1386825988 is about 37240.1126206675. The cubic root of 1386825988 is about 1115.1689202273.

The spelling of 1386825988 in words is "one billion, three hundred eighty-six million, eight hundred twenty-five thousand, nine hundred eighty-eight".