19027440 has 160 divisors (see below), whose sum is σ = 68567040. Its totient is φ = 4840704.

The previous prime is 19027439. The next prime is 19027447. The reversal of 19027440 is 4472091.

It is a happy number.

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 (19027447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49489 + ... + 49871.

It is an arithmetic number, because the mean of its divisors is an integer number (428544).

Almost surely, 2^19027440 is an apocalyptic number.

19027440 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 19027440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34283520).

19027440 is an abundant number, since it is smaller than the sum of its proper divisors (49539600).

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

19027440 is a wasteful number, since it uses less digits than its factorization.

19027440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 19027440 is about 4362.0453917858. The cubic root of 19027440 is about 266.9685608734.

The spelling of 19027440 in words is "nineteen million, twenty-seven thousand, four hundred forty".