16405480 has 64 divisors (see below), whose sum is σ = 45440640. Its totient is φ = 5190912.

The previous prime is 16405471. The next prime is 16405483. The reversal of 16405480 is 8450461.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1387 + ... + 5893.

It is an arithmetic number, because the mean of its divisors is an integer number (710010).

Almost surely, 2^16405480 is an apocalyptic number.

16405480 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 16405480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22720320).

16405480 is an abundant number, since it is smaller than the sum of its proper divisors (29035160).

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

16405480 is a wasteful number, since it uses less digits than its factorization.

16405480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538 (or 4534 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 16405480 is about 4050.3678845260. The cubic root of 16405480 is about 254.0951139024.

The spelling of 16405480 in words is "sixteen million, four hundred five thousand, four hundred eighty".