15940224 has 96 divisors (see below), whose sum is σ = 46661940. Its totient is φ = 5222400.

The previous prime is 15940213. The next prime is 15940241. The reversal of 15940224 is 42204951.

It can be written as a sum of positive squares in 2 ways, for example, as 14197824 + 1742400 = 3768^2 + 1320^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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 11 ways as a sum of consecutive naturals, for example, 116284 + ... + 116420.

Almost surely, 2^15940224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15940224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23330970).

15940224 is an abundant number, since it is smaller than the sum of its proper divisors (30721716).

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

15940224 is a wasteful number, since it uses less digits than its factorization.

15940224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 15940224 is about 3992.5210080850. The cubic root of 15940224 is about 251.6700140387.

The spelling of 15940224 in words is "fifteen million, nine hundred forty thousand, two hundred twenty-four".