19894368 has 96 divisors (see below), whose sum is σ = 59270400. Its totient is φ = 5792256.

The previous prime is 19894367. The next prime is 19894373. The reversal of 19894368 is 86349891.

19894368 = T₇₇ + T₇₈ + ... + T₄₉₂.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23293 + ... + 24131.

It is an arithmetic number, because the mean of its divisors is an integer number (617400).

Almost surely, 2^19894368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19894368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29635200).

19894368 is an abundant number, since it is smaller than the sum of its proper divisors (39376032).

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

19894368 is a wasteful number, since it uses less digits than its factorization.

19894368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 876 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 19894368 is about 4460.3103031067. The cubic root of 19894368 is about 270.9630355850.

The spelling of 19894368 in words is "nineteen million, eight hundred ninety-four thousand, three hundred sixty-eight".