16167220 has 12 divisors (see below), whose sum is σ = 33951204. Its totient is φ = 6466880.

The previous prime is 16167211. The next prime is 16167253. The reversal of 16167220 is 2276161.

It can be written as a sum of positive squares in 2 ways, for example, as 8259876 + 7907344 = 2874^2 + 2812^2 .

It is a super-2 number, since 2×16167220² = 522758005056800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404161 + ... + 404200.

It is an arithmetic number, because the mean of its divisors is an integer number (2829267).

Almost surely, 2^16167220 is an apocalyptic number.

16167220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16167220 is an abundant number, since it is smaller than the sum of its proper divisors (17783984).

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

16167220 is a wasteful number, since it uses less digits than its factorization.

16167220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808370 (or 808368 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 16167220 is about 4020.8481692300. The cubic root of 16167220 is about 252.8590193945.

It can be divided in two parts, 1616 and 7220, that added together give a square (8836 = 94²).

The spelling of 16167220 in words is "sixteen million, one hundred sixty-seven thousand, two hundred twenty".