19097856 has 108 divisors (see below), whose sum is σ = 57289232. Its totient is φ = 6345216.

The previous prime is 19097833. The next prime is 19097857. The reversal of 19097856 is 65879091.

It is a tau number, because it is divible by the number of its divisors (108).

It is not an unprimeable number, because it can be changed into a prime (19097857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62055 + ... + 62361.

Almost surely, 2^19097856 is an apocalyptic number.

19097856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19097856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28644616).

19097856 is an abundant number, since it is smaller than the sum of its proper divisors (38191376).

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

19097856 is an frugal number, since it uses more digits than its factorization.

19097856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 19097856 is about 4370.1093807821. The cubic root of 19097856 is about 267.2974843600.

The spelling of 19097856 in words is "nineteen million, ninety-seven thousand, eight hundred fifty-six".