16470640 has 20 divisors (see below), whose sum is σ = 38294424. Its totient is φ = 6588224.

The previous prime is 16470613. The next prime is 16470647. The reversal of 16470640 is 4607461.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 16470599 and 16470608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16470647) 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 3 ways as a sum of consecutive naturals, for example, 102862 + ... + 103021.

Almost surely, 2^16470640 is an apocalyptic number.

16470640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16470640 is an abundant number, since it is smaller than the sum of its proper divisors (21823784).

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

16470640 is a wasteful number, since it uses less digits than its factorization.

16470640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205896 (or 205890 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 16470640 is about 4058.4036270435. The cubic root of 16470640 is about 254.4310781752.

The spelling of 16470640 in words is "sixteen million, four hundred seventy thousand, six hundred forty".