16621480 has 32 divisors (see below), whose sum is σ = 38037600. Its totient is φ = 6534976.

The previous prime is 16621477. The next prime is 16621483. The reversal of 16621480 is 8412661.

It is an interprime number because it is at equal distance from previous prime (16621477) and next prime (16621483).

It is not an unprimeable number, because it can be changed into a prime (16621483) 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, 1162 + ... + 5881.

It is an arithmetic number, because the mean of its divisors is an integer number (1188675).

Almost surely, 2^16621480 is an apocalyptic number.

16621480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16621480 is an abundant number, since it is smaller than the sum of its proper divisors (21416120).

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

16621480 is a wasteful number, since it uses less digits than its factorization.

16621480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7113 (or 7109 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 16621480 is about 4076.9449346294. The cubic root of 16621480 is about 255.2054220668.

The spelling of 16621480 in words is "sixteen million, six hundred twenty-one thousand, four hundred eighty".