1018722132 has 36 divisors (see below), whose sum is σ = 2591519476. Its totient is φ = 337409280.

The previous prime is 1018722113. The next prime is 1018722139. The reversal of 1018722132 is 2312278101.

It can be written as a sum of positive squares in 2 ways, for example, as 122677776 + 896044356 = 11076^2 + 29934^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1018722096 and 1018722105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018722139) 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, 84469 + ... + 95772.

Almost surely, 2^1018722132 is an apocalyptic number.

1018722132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1018722132 is an abundant number, since it is smaller than the sum of its proper divisors (1572797344).

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

1018722132 is a wasteful number, since it uses less digits than its factorization.

1018722132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180408 (or 180403 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1018722132 is about 31917.4267759793. The cubic root of 1018722132 is about 1006.2021642988.

The spelling of 1018722132 in words is "one billion, eighteen million, seven hundred twenty-two thousand, one hundred thirty-two".