19428897 has 8 divisors (see below), whose sum is σ = 25937280. Its totient is φ = 12936560.

The previous prime is 19428883. The next prime is 19428901. The reversal of 19428897 is 79882491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19428897 - 2⁶ = 19428833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19428817) 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, 822 + ... + 6287.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^19428897 is an apocalyptic number.

It is an amenable number.

19428897 is a deficient number, since it is larger than the sum of its proper divisors (6508383).

19428897 is an equidigital number, since it uses as much as digits as its factorization.

19428897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023.

The product of its digits is 290304, while the sum is 48.

The square root of 19428897 is about 4407.8222514072. The cubic root of 19428897 is about 268.8330846775.

The spelling of 19428897 in words is "nineteen million, four hundred twenty-eight thousand, eight hundred ninety-seven".