16509480 has 128 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 3843072.

The previous prime is 16509433. The next prime is 16509481. The reversal of 16509480 is 8490561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16509481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29362 + ... + 29918.

It is an arithmetic number, because the mean of its divisors is an integer number (439425).

Almost surely, 2^16509480 is an apocalyptic number.

16509480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16509480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

16509480 is an abundant number, since it is smaller than the sum of its proper divisors (39736920).

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

16509480 is a wasteful number, since it uses less digits than its factorization.

16509480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16509480 is about 4063.1859420903. The cubic root of 16509480 is about 254.6309154909.

The spelling of 16509480 in words is "sixteen million, five hundred nine thousand, four hundred eighty".