18828732 has 48 divisors (see below), whose sum is σ = 47712672. Its totient is φ = 5744640.

The previous prime is 18828721. The next prime is 18828737. The reversal of 18828732 is 23782881.

It is a super-2 number, since 2×18828732² = 709042297455648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18828737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20932 + ... + 21812.

It is an arithmetic number, because the mean of its divisors is an integer number (994014).

Almost surely, 2^18828732 is an apocalyptic number.

18828732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18828732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23856336).

18828732 is an abundant number, since it is smaller than the sum of its proper divisors (28883940).

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

18828732 is a wasteful number, since it uses less digits than its factorization.

18828732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1036 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 18828732 is about 4339.2086836196. The cubic root of 18828732 is about 266.0359685282.

It can be divided in two parts, 188 and 28732, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 18828732 in words is "eighteen million, eight hundred twenty-eight thousand, seven hundred thirty-two".