16904440 has 32 divisors (see below), whose sum is σ = 43469280. Its totient is φ = 5795712.

The previous prime is 16904431. The next prime is 16904441. The reversal of 16904440 is 4440961.

16904440 = 1551² + 1552² + ... + 1557².

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 16904399 and 16904408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16904441) 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 7 ways as a sum of consecutive naturals, for example, 29907 + ... + 30466.

It is an arithmetic number, because the mean of its divisors is an integer number (1358415).

Almost surely, 2^16904440 is an apocalyptic number.

16904440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16904440 is an abundant number, since it is smaller than the sum of its proper divisors (26564840).

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

16904440 is a wasteful number, since it uses less digits than its factorization.

16904440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60391 (or 60387 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16904440 is about 4111.5009424783. The cubic root of 16904440 is about 256.6454659125.

The spelling of 16904440 in words is "sixteen million, nine hundred four thousand, four hundred forty".