19040340 has 96 divisors (see below), whose sum is σ = 61617024. Its totient is φ = 4341760.

The previous prime is 19040317. The next prime is 19040341. The reversal of 19040340 is 4304091.

It is a super-3 number, since 3×19040340³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19040341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10372 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (641844).

Almost surely, 2^19040340 is an apocalyptic number.

19040340 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 19040340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30808512).

19040340 is an abundant number, since it is smaller than the sum of its proper divisors (42576684).

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

19040340 is a wasteful number, since it uses less digits than its factorization.

19040340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 19040340 is about 4363.5238053665. The cubic root of 19040340 is about 267.0288793125.

The spelling of 19040340 in words is "nineteen million, forty thousand, three hundred forty".