16437940 has 12 divisors (see below), whose sum is σ = 34519716. Its totient is φ = 6575168.

The previous prime is 16437937. The next prime is 16437959. The reversal of 16437940 is 4973461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7365796 + 9072144 = 2714^2 + 3012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16437896 and 16437905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410929 + ... + 410968.

It is an arithmetic number, because the mean of its divisors is an integer number (2876643).

Almost surely, 2^16437940 is an apocalyptic number.

16437940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16437940 is an abundant number, since it is smaller than the sum of its proper divisors (18081776).

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

16437940 is a wasteful number, since it uses less digits than its factorization.

16437940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821906 (or 821904 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 16437940 is about 4054.3729478182. The cubic root of 16437940 is about 254.2625882985.

The spelling of 16437940 in words is "sixteen million, four hundred thirty-seven thousand, nine hundred forty".