16031380 has 12 divisors (see below), whose sum is σ = 33665940. Its totient is φ = 6412544.

The previous prime is 16031377. The next prime is 16031381. The reversal of 16031380 is 8313061.

It can be written as a sum of positive squares in 2 ways, for example, as 5299204 + 10732176 = 2302^2 + 3276^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16031381) by changing a digit.

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, 400765 + ... + 400804.

It is an arithmetic number, because the mean of its divisors is an integer number (2805495).

Almost surely, 2^16031380 is an apocalyptic number.

16031380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16031380 is an abundant number, since it is smaller than the sum of its proper divisors (17634560).

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

16031380 is a wasteful number, since it uses less digits than its factorization.

16031380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801578 (or 801576 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16031380 is about 4003.9205786329. The cubic root of 16031380 is about 252.1488370781.

The spelling of 16031380 in words is "sixteen million, thirty-one thousand, three hundred eighty".