16040656 has 30 divisors (see below), whose sum is σ = 33023990. Its totient is φ = 7546368.

The previous prime is 16040653. The next prime is 16040659. The reversal of 16040656 is 65604061.

It is an interprime number because it is at equal distance from previous prime (16040653) and next prime (16040659).

It can be written as a sum of positive squares in 3 ways, for example, as 2202256 + 13838400 = 1484^2 + 3720^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16040653) 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 5 ways as a sum of consecutive naturals, for example, 2890 + ... + 6358.

Almost surely, 2^16040656 is an apocalyptic number.

16040656 is a gapful number since it is divisible by the number (16) 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 16040656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16511995).

16040656 is an abundant number, since it is smaller than the sum of its proper divisors (16983334).

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

16040656 is a wasteful number, since it uses less digits than its factorization.

16040656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 16040656 is about 4005.0787757546. The cubic root of 16040656 is about 252.1974600839.

The spelling of 16040656 in words is "sixteen million, forty thousand, six hundred fifty-six".