16485840 has 120 divisors (see below), whose sum is σ = 63293568. Its totient is φ = 3767040.

The previous prime is 16485823. The next prime is 16485851. The reversal of 16485840 is 4858461.

16485840 is a `hidden beast` number, since 1 + 648 + 5 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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 = 16485795 and 16485804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3405 + ... + 6675.

Almost surely, 2^16485840 is an apocalyptic number.

16485840 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 16485840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31646784).

16485840 is an abundant number, since it is smaller than the sum of its proper divisors (46807728).

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

16485840 is a wasteful number, since it uses less digits than its factorization.

16485840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 16485840 is about 4060.2758526977. The cubic root of 16485840 is about 254.5093217110.

The spelling of 16485840 in words is "sixteen million, four hundred eighty-five thousand, eight hundred forty".