16777320 has 64 divisors (see below), whose sum is σ = 57525120. Its totient is φ = 3834624.

The previous prime is 16777291. The next prime is 16777331. The reversal of 16777320 is 2377761.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9147 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (898830).

Almost surely, 2^16777320 is an apocalyptic number.

16777320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16777320 is an abundant number, since it is smaller than the sum of its proper divisors (40747800).

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

16777320 is a wasteful number, since it uses less digits than its factorization.

16777320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19994 (or 19990 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 33.

The square root of 16777320 is about 4096.0126952928. The cubic root of 16777320 is about 256.0005289703. Note that the first 3 decimals are identical.

The spelling of 16777320 in words is "sixteen million, seven hundred seventy-seven thousand, three hundred twenty".