19297880 has 64 divisors (see below), whose sum is σ = 50863680. Its totient is φ = 6455040.

The previous prime is 19297879. The next prime is 19297919. The reversal of 19297880 is 8879291.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470660 + ... + 470700.

It is an arithmetic number, because the mean of its divisors is an integer number (794745).

Almost surely, 2^19297880 is an apocalyptic number.

19297880 is a gapful number since it is divisible by the number (10) 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 19297880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25431840).

19297880 is an abundant number, since it is smaller than the sum of its proper divisors (31565800).

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

19297880 is an frugal number, since it uses more digits than its factorization.

19297880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 19297880 is about 4392.9352374011. The cubic root of 19297880 is about 268.2274374355.

The spelling of 19297880 in words is "nineteen million, two hundred ninety-seven thousand, eight hundred eighty".