19412728 has 8 divisors (see below), whose sum is σ = 36398880. Its totient is φ = 9706360.

The previous prime is 19412669. The next prime is 19412741. The reversal of 19412728 is 82721491.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 19412693 and 19412702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1213288 + ... + 1213303.

It is an arithmetic number, because the mean of its divisors is an integer number (4549860).

Almost surely, 2^19412728 is an apocalyptic number.

It is an amenable number.

19412728 is a deficient number, since it is larger than the sum of its proper divisors (16986152).

19412728 is a wasteful number, since it uses less digits than its factorization.

19412728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426597 (or 2426593 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 19412728 is about 4405.9877439684. The cubic root of 19412728 is about 268.7584884285.

The spelling of 19412728 in words is "nineteen million, four hundred twelve thousand, seven hundred twenty-eight".