16464220 has 24 divisors (see below), whose sum is σ = 34683264. Its totient is φ = 6565056.

The previous prime is 16464187. The next prime is 16464229. The reversal of 16464220 is 2246461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16464229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6357 + ... + 8563.

It is an arithmetic number, because the mean of its divisors is an integer number (1445136).

Almost surely, 2^16464220 is an apocalyptic number.

16464220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16464220 is an abundant number, since it is smaller than the sum of its proper divisors (18219044).

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

16464220 is a wasteful number, since it uses less digits than its factorization.

16464220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589 (or 2587 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 16464220 is about 4057.6125985609. The cubic root of 16464220 is about 254.3980161165.

The spelling of 16464220 in words is "sixteen million, four hundred sixty-four thousand, two hundred twenty".