16278963 has 8 divisors (see below), whose sum is σ = 22649088. Its totient is φ = 10380744.

The previous prime is 16278943. The next prime is 16278989. The reversal of 16278963 is 36987261.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16278963 - 2⁵ = 16278931 is a prime.

It is a super-4 number, since 4×16278963⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (16278943) 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, 117895 + ... + 118032.

It is an arithmetic number, because the mean of its divisors is an integer number (2831136).

Almost surely, 2^16278963 is an apocalyptic number.

16278963 is a deficient number, since it is larger than the sum of its proper divisors (6370125).

16278963 is a wasteful number, since it uses less digits than its factorization.

16278963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235953.

The product of its digits is 108864, while the sum is 42.

The square root of 16278963 is about 4034.7196928659. The cubic root of 16278963 is about 253.4402443875.

The spelling of 16278963 in words is "sixteen million, two hundred seventy-eight thousand, nine hundred sixty-three".