16409745 has 24 divisors (see below), whose sum is σ = 31030272. Its totient is φ = 7956000.

The previous prime is 16409719. The next prime is 16409753. The reversal of 16409745 is 54790461.

16409745 is a `hidden beast` number, since 1 + 640 + 9 + 7 + 4 + 5 = 666.

16409745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16409745 - 2⁵ = 16409713 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16081 + ... + 17070.

It is an arithmetic number, because the mean of its divisors is an integer number (1292928).

Almost surely, 2^16409745 is an apocalyptic number.

16409745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16409745 is a deficient number, since it is larger than the sum of its proper divisors (14620527).

16409745 is a wasteful number, since it uses less digits than its factorization.

16409745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33173 (or 33170 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 16409745 is about 4050.8943456970. The cubic root of 16409745 is about 254.1171313779.

The spelling of 16409745 in words is "sixteen million, four hundred nine thousand, seven hundred forty-five".