15400344728 has 32 divisors (see below), whose sum is σ = 29433272400. Its totient is φ = 7552078848.

The previous prime is 15400344719. The next prime is 15400344731. The reversal of 15400344728 is 82744300451.

It is a junction number, because it is equal to n+sod(n) for n = 15400344691 and 15400344700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166700 + ... + 242052.

Almost surely, 2^15400344728 is an apocalyptic number.

It is an amenable number.

15400344728 is a deficient number, since it is larger than the sum of its proper divisors (14032927672).

15400344728 is a wasteful number, since it uses less digits than its factorization.

15400344728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75851 (or 75847 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The spelling of 15400344728 in words is "fifteen billion, four hundred million, three hundred forty-four thousand, seven hundred twenty-eight".