19444992 has 72 divisors (see below), whose sum is σ = 59161536. Its totient is φ = 5554176.

The previous prime is 19444969. The next prime is 19445009. The reversal of 19444992 is 29944491.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568 + ... + 7184.

It is an arithmetic number, because the mean of its divisors is an integer number (821688).

Almost surely, 2^19444992 is an apocalyptic number.

19444992 is a gapful number since it is divisible by the number (12) 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 19444992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29580768).

19444992 is an abundant number, since it is smaller than the sum of its proper divisors (39716544).

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

19444992 is an equidigital number, since it uses as much as digits as its factorization.

19444992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643 (or 3629 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 19444992 is about 4409.6476049680. The cubic root of 19444992 is about 268.9072984332.

The spelling of 19444992 in words is "nineteen million, four hundred forty-four thousand, nine hundred ninety-two".