19349940 has 48 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 5141760.

The previous prime is 19349899. The next prime is 19349959. The reversal of 19349940 is 4994391.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 30951 + ... + 31569.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^19349940 is an apocalyptic number.

19349940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19349940 is an abundant number, since it is smaller than the sum of its proper divisors (35021580).

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

19349940 is a wasteful number, since it uses less digits than its factorization.

19349940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 19349940 is about 4398.8566696359. The cubic root of 19349940 is about 268.4684204230.

The spelling of 19349940 in words is "nineteen million, three hundred forty-nine thousand, nine hundred forty".