19464144 has 80 divisors (see below), whose sum is σ = 58603392. Its totient is φ = 5451264.

The previous prime is 19464143. The next prime is 19464161. The reversal of 19464144 is 44146491.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19464143) 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, 17262 + ... + 18354.

Almost surely, 2^19464144 is an apocalyptic number.

19464144 is a gapful number since it is divisible by the number (14) 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 19464144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29301696).

19464144 is an abundant number, since it is smaller than the sum of its proper divisors (39139248).

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

19464144 is a wasteful number, since it uses less digits than its factorization.

19464144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1158 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 19464144 is about 4411.8186726111. The cubic root of 19464144 is about 268.9955546222.

The spelling of 19464144 in words is "nineteen million, four hundred sixty-four thousand, one hundred forty-four".