19382940 has 72 divisors (see below), whose sum is σ = 59164560. Its totient is φ = 5136384.

The previous prime is 19382927. The next prime is 19382947. The reversal of 19382940 is 4928391.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19382895 and 19382904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19382947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46051 + ... + 46469.

It is an arithmetic number, because the mean of its divisors is an integer number (821730).

Almost surely, 2^19382940 is an apocalyptic number.

19382940 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 19382940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29582280).

19382940 is an abundant number, since it is smaller than the sum of its proper divisors (39781620).

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

19382940 is a wasteful number, since it uses less digits than its factorization.

19382940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 19382940 is about 4402.6060464230. The cubic root of 19382940 is about 268.6209519251.

The spelling of 19382940 in words is "nineteen million, three hundred eighty-two thousand, nine hundred forty".