19424390 has 32 divisors (see below), whose sum is σ = 36115200. Its totient is φ = 7517664.

The previous prime is 19424389. The next prime is 19424399. The reversal of 19424390 is 9342491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19424399) 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, 85457 + ... + 85683.

It is an arithmetic number, because the mean of its divisors is an integer number (1128600).

Almost surely, 2^19424390 is an apocalyptic number.

19424390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19424390 is a deficient number, since it is larger than the sum of its proper divisors (16690810).

19424390 is a wasteful number, since it uses less digits than its factorization.

19424390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 19424390 is about 4407.3109715562. The cubic root of 19424390 is about 268.8122956364.

The spelling of 19424390 in words is "nineteen million, four hundred twenty-four thousand, three hundred ninety".