15606240 has 192 divisors, whose sum is σ = 55121472. Its totient is φ = 3686400.

The previous prime is 15606229. The next prime is 15606257. The reversal of 15606240 is 4260651.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15606240.

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 31 ways as a sum of consecutive naturals, for example, 255810 + ... + 255870.

It is an arithmetic number, because the mean of its divisors is an integer number (287091).

Almost surely, 2^15606240 is an apocalyptic number.

15606240 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 15606240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27560736).

15606240 is an abundant number, since it is smaller than the sum of its proper divisors (39515232).

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

15606240 is a wasteful number, since it uses less digits than its factorization.

15606240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 15606240 is about 3950.4733893547. The cubic root of 15606240 is about 249.8999065973.

Adding to 15606240 its reverse (4260651), we get a palindrome (19866891).

It can be divided in two parts, 1560 and 6240, that multiplied together give a square (9734400 = 3120²).

The spelling of 15606240 in words is "fifteen million, six hundred six thousand, two hundred forty".