16390720 has 112 divisors (see below), whose sum is σ = 43452288. Its totient is φ = 5857280.

The previous prime is 16390681. The next prime is 16390721. The reversal of 16390720 is 2709361.

It is not an unprimeable number, because it can be changed into a prime (16390721) 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, 125055 + ... + 125185.

Almost surely, 2^16390720 is an apocalyptic number.

16390720 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 16390720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21726144).

16390720 is an abundant number, since it is smaller than the sum of its proper divisors (27061568).

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

16390720 is a wasteful number, since it uses less digits than its factorization.

16390720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 16390720 is about 4048.5454178013. The cubic root of 16390720 is about 254.0188879665.

The spelling of 16390720 in words is "sixteen million, three hundred ninety thousand, seven hundred twenty".