16439740 has 24 divisors (see below), whose sum is σ = 34710480. Its totient is φ = 6540288.

The previous prime is 16439677. The next prime is 16439743. The reversal of 16439740 is 4793461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16439696 and 16439705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16439743) 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, 1731 + ... + 5989.

It is an arithmetic number, because the mean of its divisors is an integer number (1446270).

Almost surely, 2^16439740 is an apocalyptic number.

16439740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16439740 is an abundant number, since it is smaller than the sum of its proper divisors (18270740).

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

16439740 is a wasteful number, since it uses less digits than its factorization.

16439740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461 (or 4459 counting only the distinct ones).

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

The square root of 16439740 is about 4054.5949242804. The cubic root of 16439740 is about 254.2718687792.

The spelling of 16439740 in words is "sixteen million, four hundred thirty-nine thousand, seven hundred forty".