19113408 has 84 divisors (see below), whose sum is σ = 56860440. Its totient is φ = 6365952.

The previous prime is 19113403. The next prime is 19113427. The reversal of 19113408 is 80431191.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19113403) 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, 14938 + ... + 16166.

It is an arithmetic number, because the mean of its divisors is an integer number (676910).

Almost surely, 2^19113408 is an apocalyptic number.

19113408 is a gapful number since it is divisible by the number (18) 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 19113408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28430220).

19113408 is an abundant number, since it is smaller than the sum of its proper divisors (37747032).

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

19113408 is an equidigital number, since it uses as much as digits as its factorization.

19113408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 19113408 is about 4371.8883791790. Note that the first 3 decimals coincide. The cubic root of 19113408 is about 267.3700209943.

19113408 divided by its product of nonzero digits (864) gives a palindrome (22122).

Adding to 19113408 its reverse (80431191), we get a palindrome (99544599).

The spelling of 19113408 in words is "nineteen million, one hundred thirteen thousand, four hundred eight".