19309340 has 12 divisors (see below), whose sum is σ = 40549656. Its totient is φ = 7723728.

The previous prime is 19309337. The next prime is 19309363. The reversal of 19309340 is 4390391.

It is a super-2 number, since 2×19309340² = 745701222471200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 482714 + ... + 482753.

It is an arithmetic number, because the mean of its divisors is an integer number (3379138).

Almost surely, 2^19309340 is an apocalyptic number.

19309340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19309340 is an abundant number, since it is smaller than the sum of its proper divisors (21240316).

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

19309340 is a wasteful number, since it uses less digits than its factorization.

19309340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965476 (or 965474 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 19309340 is about 4394.2394108651. The cubic root of 19309340 is about 268.2805223367.

The spelling of 19309340 in words is "nineteen million, three hundred nine thousand, three hundred forty".