16026640 has 40 divisors (see below), whose sum is σ = 42586560. Its totient is φ = 5494656.

The previous prime is 16026599. The next prime is 16026641. The reversal of 16026640 is 4662061.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (16026641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13750 + ... + 14869.

It is an arithmetic number, because the mean of its divisors is an integer number (1064664).

Almost surely, 2^16026640 is an apocalyptic number.

16026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16026640 is an abundant number, since it is smaller than the sum of its proper divisors (26559920).

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

16026640 is a wasteful number, since it uses less digits than its factorization.

16026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28639 (or 28633 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 16026640 is about 4003.3286150402. The cubic root of 16026640 is about 252.1239836698.

The spelling of 16026640 in words is "sixteen million, twenty-six thousand, six hundred forty".