16863144 has 32 divisors (see below), whose sum is σ = 42876000. Its totient is φ = 5525312.

The previous prime is 16863137. The next prime is 16863173. The reversal of 16863144 is 44136861.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4539 + ... + 7370.

It is an arithmetic number, because the mean of its divisors is an integer number (1339875).

Almost surely, 2^16863144 is an apocalyptic number.

It is an amenable number.

16863144 is an abundant number, since it is smaller than the sum of its proper divisors (26012856).

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

16863144 is a wasteful number, since it uses less digits than its factorization.

16863144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11977 (or 11973 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 16863144 is about 4106.4758613682. The cubic root of 16863144 is about 256.4363083731.

The spelling of 16863144 in words is "sixteen million, eight hundred sixty-three thousand, one hundred forty-four".