1838321532 has 18 divisors (see below), whose sum is σ = 4646868408. Its totient is φ = 612773832.

The previous prime is 1838321531. The next prime is 1838321533. The reversal of 1838321532 is 2351238381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1838321531) and next prime (1838321533).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 51064487 = 1838321532 / (1 + 8 + 3 + 8 + 3 + 2 + 1 + 5 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838321531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25532208 + ... + 25532279.

It is an arithmetic number, because the mean of its divisors is an integer number (258159356).

Almost surely, 2^1838321532 is an apocalyptic number.

1838321532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1838321532 is an abundant number, since it is smaller than the sum of its proper divisors (2808546876).

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

1838321532 is a wasteful number, since it uses less digits than its factorization.

1838321532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51064497 (or 51064492 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1838321532 is about 42875.6519717193. The cubic root of 1838321532 is about 1225.0124184775.

The spelling of 1838321532 in words is "one billion, eight hundred thirty-eight million, three hundred twenty-one thousand, five hundred thirty-two".