19097928 has 24 divisors (see below), whose sum is σ = 51723750. Its totient is φ = 6365952.

The previous prime is 19097909. The next prime is 19097959. The reversal of 19097928 is 82979091.

It can be written as a sum of positive squares in only one way, i.e., 16793604 + 2304324 = 4098^2 + 1518^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132553 + ... + 132696.

Almost surely, 2^19097928 is an apocalyptic number.

19097928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19097928 is an abundant number, since it is smaller than the sum of its proper divisors (32625822).

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

19097928 is a wasteful number, since it uses less digits than its factorization.

19097928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265261 (or 265254 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 19097928 is about 4370.1176185544. The cubic root of 19097928 is about 267.2978202685.

The spelling of 19097928 in words is "nineteen million, ninety-seven thousand, nine hundred twenty-eight".