15380428 has 24 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 6568464.

The previous prime is 15380383. The next prime is 15380429. The reversal of 15380428 is 82408351.

It is a self number, because there is not a number n which added to its sum of digits gives 15380428.

It is not an unprimeable number, because it can be changed into a prime (15380429) 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, 8925 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (1286208).

Almost surely, 2^15380428 is an apocalyptic number.

It is an amenable number.

15380428 is an abundant number, since it is smaller than the sum of its proper divisors (15488564).

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

15380428 is a wasteful number, since it uses less digits than its factorization.

15380428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 15380428 is about 3921.7888775405. The cubic root of 15380428 is about 248.6887505234.

Adding to 15380428 its reverse (82408351), we get a palindrome (97788779).

The spelling of 15380428 in words is "fifteen million, three hundred eighty thousand, four hundred twenty-eight".