16215040 has 44 divisors (see below), whose sum is σ = 38909376. Its totient is φ = 6483968.

The previous prime is 16215019. The next prime is 16215041. The reversal of 16215040 is 4051261.

It is a junction number, because it is equal to n+sod(n) for n = 16214999 and 16215017.

It is not an unprimeable number, because it can be changed into a prime (16215041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3537 + ... + 6703.

It is an arithmetic number, because the mean of its divisors is an integer number (884304).

Almost surely, 2^16215040 is an apocalyptic number.

16215040 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 16215040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19454688).

16215040 is an abundant number, since it is smaller than the sum of its proper divisors (22694336).

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

16215040 is an equidigital number, since it uses as much as digits as its factorization.

16215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192 (or 3174 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16215040 is about 4026.7902850782. The cubic root of 16215040 is about 253.1080792428.

The spelling of 16215040 in words is "sixteen million, two hundred fifteen thousand, forty".