16439140 has 24 divisors (see below), whose sum is σ = 34627320. Its totient is φ = 6555648.

The previous prime is 16439117. The next prime is 16439141. The reversal of 16439140 is 4193461.

It can be written as a sum of positive squares in 4 ways, for example, as 614656 + 15824484 = 784^2 + 3978^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16439099 and 16439108.

It is not an unprimeable number, because it can be changed into a prime (16439141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6724 + ... + 8836.

It is an arithmetic number, because the mean of its divisors is an integer number (1442805).

Almost surely, 2^16439140 is an apocalyptic number.

16439140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16439140 is an abundant number, since it is smaller than the sum of its proper divisors (18188180).

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

16439140 is a wasteful number, since it uses less digits than its factorization.

16439140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16439140 is about 4054.5209334766. The cubic root of 16439140 is about 254.2687753609.

It can be divided in two parts, 164 and 39140, that added together give a cube (39304 = 34³).

The spelling of 16439140 in words is "sixteen million, four hundred thirty-nine thousand, one hundred forty".