16003240 has 64 divisors (see below), whose sum is σ = 40383360. Its totient is φ = 5656320.

The previous prime is 16003237. The next prime is 16003303. The reversal of 16003240 is 4230061.

16003240 = T₃₂₀ + T₃₂₁ + ... + T₅₀₄.

It is a super-2 number, since 2×16003240² = 512207380995200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15789 + ... + 16771.

It is an arithmetic number, because the mean of its divisors is an integer number (630990).

Almost surely, 2^16003240 is an apocalyptic number.

16003240 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 16003240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20191680).

16003240 is an abundant number, since it is smaller than the sum of its proper divisors (24380120).

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

16003240 is a wasteful number, since it uses less digits than its factorization.

16003240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 16003240 is about 4000.4049794990. The cubic root of 16003240 is about 252.0012177652.

The spelling of 16003240 in words is "sixteen million, three thousand, two hundred forty".