1318661900 has 36 divisors (see below), whose sum is σ = 2960175120. Its totient is φ = 509275200.

The previous prime is 1318661863. The next prime is 1318661909. The reversal of 1318661900 is 91668131.

It is a super-2 number, since 2×1318661900² = 3477738413023220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1318661909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224456 + ... + 230255.

Almost surely, 2^1318661900 is an apocalyptic number.

1318661900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1318661900 is an abundant number, since it is smaller than the sum of its proper divisors (1641513220).

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

1318661900 is a wasteful number, since it uses less digits than its factorization.

1318661900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454754 (or 454747 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1318661900 is about 36313.3845847506. The cubic root of 1318661900 is about 1096.5905175069.

The spelling of 1318661900 in words is "one billion, three hundred eighteen million, six hundred sixty-one thousand, nine hundred".