1138532020 has 24 divisors (see below), whose sum is σ = 2393836200. Its totient is φ = 454856832.

The previous prime is 1138532011. The next prime is 1138532023. The reversal of 1138532020 is 202358311.

It can be written as a sum of positive squares in 4 ways, for example, as 510127396 + 628404624 = 22586^2 + 25068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138532023) 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 7 ways as a sum of consecutive naturals, for example, 17755 + ... + 50914.

It is an arithmetic number, because the mean of its divisors is an integer number (99743175).

Almost surely, 2^1138532020 is an apocalyptic number.

1138532020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138532020 is an abundant number, since it is smaller than the sum of its proper divisors (1255304180).

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

1138532020 is a wasteful number, since it uses less digits than its factorization.

1138532020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69507 (or 69505 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1138532020 is about 33742.1401218121. The cubic root of 1138532020 is about 1044.1953376117.

The spelling of 1138532020 in words is "one billion, one hundred thirty-eight million, five hundred thirty-two thousand, twenty".