16620464 has 40 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 6891840.

The previous prime is 16620463. The next prime is 16620481. The reversal of 16620464 is 46402661.

It is not an unprimeable number, because it can be changed into a prime (16620463) 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, 1079 + ... + 5865.

Almost surely, 2^16620464 is an apocalyptic number.

16620464 is a gapful number since it is divisible by the number (14) 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 16620464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18998784).

16620464 is an abundant number, since it is smaller than the sum of its proper divisors (21377104).

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

16620464 is a wasteful number, since it uses less digits than its factorization.

16620464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833 (or 4827 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 16620464 is about 4076.8203296196. The cubic root of 16620464 is about 255.2002220888.

The spelling of 16620464 in words is "sixteen million, six hundred twenty thousand, four hundred sixty-four".