15308740 has 12 divisors (see below), whose sum is σ = 32148396. Its totient is φ = 6123488.

The previous prime is 15308701. The next prime is 15308747. The reversal of 15308740 is 4780351.

It can be written as a sum of positive squares in 2 ways, for example, as 9634816 + 5673924 = 3104^2 + 2382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15308699 and 15308708.

It is not an unprimeable number, because it can be changed into a prime (15308747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382699 + ... + 382738.

It is an arithmetic number, because the mean of its divisors is an integer number (2679033).

Almost surely, 2^15308740 is an apocalyptic number.

15308740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15308740 is an abundant number, since it is smaller than the sum of its proper divisors (16839656).

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

15308740 is a wasteful number, since it uses less digits than its factorization.

15308740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765446 (or 765444 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 15308740 is about 3912.6384959513. The cubic root of 15308740 is about 248.3017701829.

The spelling of 15308740 in words is "fifteen million, three hundred eight thousand, seven hundred forty".