16409772 has 18 divisors (see below), whose sum is σ = 41480348. Its totient is φ = 5469912.

The previous prime is 16409753. The next prime is 16409779. The reversal of 16409772 is 27790461.

It is a happy number.

16409772 is a `hidden beast` number, since 1 + 640 + 9 + 7 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 455827 = 16409772 / (1 + 6 + 4 + 0 + 9 + 7 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (16409779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227878 + ... + 227949.

Almost surely, 2^16409772 is an apocalyptic number.

16409772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16409772 is an abundant number, since it is smaller than the sum of its proper divisors (25070576).

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

16409772 is a wasteful number, since it uses less digits than its factorization.

16409772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455837 (or 455832 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 16409772 is about 4050.8976782930. The cubic root of 16409772 is about 254.1172707496.

The spelling of 16409772 in words is "sixteen million, four hundred nine thousand, seven hundred seventy-two".