18389952 has 84 divisors (see below), whose sum is σ = 60254896. Its totient is φ = 5253120.

The previous prime is 18389933. The next prime is 18389953. The reversal of 18389952 is 25998381.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a junction number, because it is equal to n+sod(n) for n = 18389898 and 18389907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18389953) 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, 1752 + ... + 6312.

Almost surely, 2^18389952 is an apocalyptic number.

18389952 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 18389952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30127448).

18389952 is an abundant number, since it is smaller than the sum of its proper divisors (41864944).

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

18389952 is a wasteful number, since it uses less digits than its factorization.

18389952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4586 (or 4573 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 18389952 is about 4288.3507319248. The cubic root of 18389952 is about 263.9531597339.

The spelling of 18389952 in words is "eighteen million, three hundred eighty-nine thousand, nine hundred fifty-two".