16278016 has 20 divisors (see below), whose sum is σ = 32525262. Its totient is φ = 8138752.

The previous prime is 16277999. The next prime is 16278047. The reversal of 16278016 is 61087261.

It can be written as a sum of positive squares in only one way, i.e., 12278016 + 4000000 = 3504^2 + 2000^2 .

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15385 + ... + 16408.

Almost surely, 2^16278016 is an apocalyptic number.

16278016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16278016 is a deficient number, since it is larger than the sum of its proper divisors (16247246).

16278016 is an frugal number, since it uses more digits than its factorization.

16278016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31811 (or 31795 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 16278016 is about 4034.6023348033. The cubic root of 16278016 is about 253.4353298123.

The spelling of 16278016 in words is "sixteen million, two hundred seventy-eight thousand, sixteen".