19798416 has 120 divisors (see below), whose sum is σ = 62674560. Its totient is φ = 5779200.

The previous prime is 19798409. The next prime is 19798439. The reversal of 19798416 is 61489791.

It is a happy number.

It is a super-2 number, since 2×19798416² = 783954552218112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45721 + ... + 46151.

It is an arithmetic number, because the mean of its divisors is an integer number (522288).

Almost surely, 2^19798416 is an apocalyptic number.

19798416 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 19798416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31337280).

19798416 is an abundant number, since it is smaller than the sum of its proper divisors (42876144).

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

19798416 is a wasteful number, since it uses less digits than its factorization.

19798416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 476 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 19798416 is about 4449.5410999338. The cubic root of 19798416 is about 270.5267084692.

The spelling of 19798416 in words is "nineteen million, seven hundred ninety-eight thousand, four hundred sixteen".