16538480 has 60 divisors (see below), whose sum is σ = 44740440. Its totient is φ = 5668992.

The previous prime is 16538479. The next prime is 16538507. The reversal of 16538480 is 8483561.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 16538480.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1811 + ... + 6029.

It is an arithmetic number, because the mean of its divisors is an integer number (745674).

Almost surely, 2^16538480 is an apocalyptic number.

16538480 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 16538480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22370220).

16538480 is an abundant number, since it is smaller than the sum of its proper divisors (28201960).

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

16538480 is a wasteful number, since it uses less digits than its factorization.

16538480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246 (or 4233 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 16538480 is about 4066.7530045480. The cubic root of 16538480 is about 254.7799203272.

The spelling of 16538480 in words is "sixteen million, five hundred thirty-eight thousand, four hundred eighty".