15423040 has 28 divisors (see below), whose sum is σ = 36726876. Its totient is φ = 6169088.

The previous prime is 15423019. The next prime is 15423047. The reversal of 15423040 is 4032451.

It can be written as a sum of positive squares in 2 ways, for example, as 9193024 + 6230016 = 3032^2 + 2496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15422999 and 15423017.

It is not an unprimeable number, because it can be changed into a prime (15423047) 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 3 ways as a sum of consecutive naturals, for example, 23779 + ... + 24418.

Almost surely, 2^15423040 is an apocalyptic number.

15423040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15423040 is an abundant number, since it is smaller than the sum of its proper divisors (21303836).

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

15423040 is an equidigital number, since it uses as much as digits as its factorization.

15423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48214 (or 48204 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 15423040 is about 3927.2178447344. The cubic root of 15423040 is about 248.9182056358.

Adding to 15423040 its reverse (4032451), we get a palindrome (19455491).

The spelling of 15423040 in words is "fifteen million, four hundred twenty-three thousand, forty".