16403040 has 96 divisors (see below), whose sum is σ = 57425760. Its totient is φ = 4372992.

The previous prime is 16403039. The next prime is 16403053. The reversal of 16403040 is 4030461.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2422 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (598185).

Almost surely, 2^16403040 is an apocalyptic number.

16403040 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 16403040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28712880).

16403040 is an abundant number, since it is smaller than the sum of its proper divisors (41022720).

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

16403040 is a wasteful number, since it uses less digits than its factorization.

16403040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821 (or 3807 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 16403040 is about 4050.0666661180. The cubic root of 16403040 is about 254.0825160222.

The spelling of 16403040 in words is "sixteen million, four hundred three thousand, forty".