19424740 has 12 divisors (see below), whose sum is σ = 40791996. Its totient is φ = 7769888.

The previous prime is 19424737. The next prime is 19424767. The reversal of 19424740 is 4742491.

It can be written as a sum of positive squares in 2 ways, for example, as 2334784 + 17089956 = 1528^2 + 4134^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 485599 + ... + 485638.

It is an arithmetic number, because the mean of its divisors is an integer number (3399333).

Almost surely, 2^19424740 is an apocalyptic number.

19424740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19424740 is an abundant number, since it is smaller than the sum of its proper divisors (21367256).

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

19424740 is a wasteful number, since it uses less digits than its factorization.

19424740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971246 (or 971244 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 19424740 is about 4407.3506781285. The cubic root of 19424740 is about 268.8139101657.

It can be divided in two parts, 19424 and 740, that added together give a square (20164 = 142²).

The spelling of 19424740 in words is "nineteen million, four hundred twenty-four thousand, seven hundred forty".