16424640 has 112 divisors (see below), whose sum is σ = 57972960. Its totient is φ = 4377600.

The previous prime is 16424627. The next prime is 16424651. The reversal of 16424640 is 4642461.

16424640 is a `hidden beast` number, since 16 + 4 + 2 + 4 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7690 + ... + 9590.

Almost surely, 2^16424640 is an apocalyptic number.

16424640 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 16424640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28986480).

16424640 is an abundant number, since it is smaller than the sum of its proper divisors (41548320).

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

16424640 is a wasteful number, since it uses less digits than its factorization.

16424640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927 (or 1911 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 16424640 is about 4052.7324115959. The cubic root of 16424640 is about 254.1939948519.

The spelling of 16424640 in words is "sixteen million, four hundred twenty-four thousand, six hundred forty".