1386638900 has 18 divisors (see below), whose sum is σ = 3009006630. Its totient is φ = 554655520.

The previous prime is 1386638863. The next prime is 1386638921. The reversal of 1386638900 is 98366831.

It can be written as a sum of positive squares in 3 ways, for example, as 171976996 + 1214661904 = 13114^2 + 34852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6933095 + ... + 6933294.

It is an arithmetic number, because the mean of its divisors is an integer number (167167035).

Almost surely, 2^1386638900 is an apocalyptic number.

1386638900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386638900 is an abundant number, since it is smaller than the sum of its proper divisors (1622367730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1386638900 is a wasteful number, since it uses less digits than its factorization.

1386638900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13866403 (or 13866396 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 1386638900 is about 37237.6006208778. The cubic root of 1386638900 is about 1115.1187711561.

The spelling of 1386638900 in words is "one billion, three hundred eighty-six million, six hundred thirty-eight thousand, nine hundred".