16381266 has 16 divisors (see below), whose sum is σ = 35741088. Its totient is φ = 4964000.

The previous prime is 16381247. The next prime is 16381279. The reversal of 16381266 is 66218361.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 124035 + ... + 124166.

It is an arithmetic number, because the mean of its divisors is an integer number (2233818).

Almost surely, 2^16381266 is an apocalyptic number.

16381266 is an abundant number, since it is smaller than the sum of its proper divisors (19359822).

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

16381266 is a wasteful number, since it uses less digits than its factorization.

16381266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248217.

The product of its digits is 10368, while the sum is 33.

The square root of 16381266 is about 4047.3776695535. The cubic root of 16381266 is about 253.9700400730.

It can be divided in two parts, 163812 and 66, that added together give a triangular number (163878 = T₅₇₂).

The spelling of 16381266 in words is "sixteen million, three hundred eighty-one thousand, two hundred sixty-six".