15966740 has 48 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 5952000.

The previous prime is 15966739. The next prime is 15966749. The reversal of 15966740 is 4766951.

It is a junction number, because it is equal to n+sod(n) for n = 15966694 and 15966703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15966749) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 51185 + ... + 51495.

It is an arithmetic number, because the mean of its divisors is an integer number (746928).

Almost surely, 2^15966740 is an apocalyptic number.

15966740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15966740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17926272).

15966740 is an abundant number, since it is smaller than the sum of its proper divisors (19885804).

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

15966740 is a wasteful number, since it uses less digits than its factorization.

15966740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 15966740 is about 3995.8403371506. The cubic root of 15966740 is about 251.8094847942.

The spelling of 15966740 in words is "fifteen million, nine hundred sixty-six thousand, seven hundred forty".