15825040 has 120 divisors (see below), whose sum is σ = 46818432. Its totient is φ = 4919040.

The previous prime is 15825037. The next prime is 15825049. The reversal of 15825040 is 4052851.

It is a junction number, because it is equal to n+sod(n) for n = 15824996 and 15825014.

It is not an unprimeable number, because it can be changed into a prime (15825049) 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, 42937 + ... + 43303.

Almost surely, 2^15825040 is an apocalyptic number.

15825040 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 15825040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23409216).

15825040 is an abundant number, since it is smaller than the sum of its proper divisors (30993392).

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

15825040 is a wasteful number, since it uses less digits than its factorization.

15825040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 15825040 is about 3978.0698837502. The cubic root of 15825040 is about 251.0623591773.

Adding to 15825040 its reverse (4052851), we get a palindrome (19877891).

The spelling of 15825040 in words is "fifteen million, eight hundred twenty-five thousand, forty".