15966258 has 48 divisors (see below), whose sum is σ = 40531104. Its totient is φ = 4146240.

The previous prime is 15966257. The next prime is 15966283. The reversal of 15966258 is 85266951.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (15966253) 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 23 ways as a sum of consecutive naturals, for example, 766 + ... + 5702.

It is an arithmetic number, because the mean of its divisors is an integer number (844398).

Almost surely, 2^15966258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15966258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20265552).

15966258 is an abundant number, since it is smaller than the sum of its proper divisors (24564846).

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

15966258 is a wasteful number, since it uses less digits than its factorization.

15966258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4967 (or 4960 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 15966258 is about 3995.7800239753. The cubic root of 15966258 is about 251.8069509145.

The spelling of 15966258 in words is "fifteen million, nine hundred sixty-six thousand, two hundred fifty-eight".