15323420 has 24 divisors (see below), whose sum is σ = 36776544. Its totient is φ = 5253696.

The previous prime is 15323401. The next prime is 15323423. The reversal of 15323420 is 2432351.

It is a happy number.

15323420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 15323392 and 15323401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15323423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54587 + ... + 54866.

It is an arithmetic number, because the mean of its divisors is an integer number (1532356).

Almost surely, 2^15323420 is an apocalyptic number.

15323420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15323420 is an abundant number, since it is smaller than the sum of its proper divisors (21453124).

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

15323420 is a wasteful number, since it uses less digits than its factorization.

15323420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109469 (or 109467 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 15323420 is about 3914.5140183681. The cubic root of 15323420 is about 248.3811127781.

Adding to 15323420 its reverse (2432351), we get a palindrome (17755771).

The spelling of 15323420 in words is "fifteen million, three hundred twenty-three thousand, four hundred twenty".