13945940 has 24 divisors (see below), whose sum is σ = 29370600. Its totient is φ = 5562368.

The previous prime is 13945937. The next prime is 13945963. The reversal of 13945940 is 4954931.

It can be written as a sum of positive squares in 4 ways, for example, as 300304 + 13645636 = 548^2 + 3694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13945940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8204 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (1223775).

Almost surely, 2^13945940 is an apocalyptic number.

13945940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13945940 is an abundant number, since it is smaller than the sum of its proper divisors (15424660).

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

13945940 is a wasteful number, since it uses less digits than its factorization.

13945940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 13945940 is about 3734.4263280991. The cubic root of 13945940 is about 240.7036065216.

The spelling of 13945940 in words is "thirteen million, nine hundred forty-five thousand, nine hundred forty".