18483840 has 96 divisors (see below), whose sum is σ = 63846900. Its totient is φ = 4927488.

The previous prime is 18483823. The next prime is 18483859. The reversal of 18483840 is 4838481.

It can be written as a sum of positive squares in 2 ways, for example, as 18455616 + 28224 = 4296^2 + 168^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×18483840² = 683304682291200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18483795 and 18483804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4156 + ... + 7364.

Almost surely, 2^18483840 is an apocalyptic number.

18483840 is a gapful number since it is divisible by the number (10) 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 18483840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31923450).

18483840 is an abundant number, since it is smaller than the sum of its proper divisors (45363060).

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

18483840 is a wasteful number, since it uses less digits than its factorization.

18483840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 18483840 is about 4299.2836612627. The cubic root of 18483840 is about 264.4015926506.

The spelling of 18483840 in words is "eighteen million, four hundred eighty-three thousand, eight hundred forty".