19078340 has 12 divisors (see below), whose sum is σ = 40064556. Its totient is φ = 7631328.

The previous prime is 19078333. The next prime is 19078343. The reversal of 19078340 is 4387091.

It can be written as a sum of positive squares in 2 ways, for example, as 7409284 + 11669056 = 2722^2 + 3416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19078297 and 19078306.

It is not an unprimeable number, because it can be changed into a prime (19078343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476939 + ... + 476978.

It is an arithmetic number, because the mean of its divisors is an integer number (3338713).

Almost surely, 2^19078340 is an apocalyptic number.

19078340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19078340 is an abundant number, since it is smaller than the sum of its proper divisors (20986216).

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

19078340 is a wasteful number, since it uses less digits than its factorization.

19078340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953926 (or 953924 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 19078340 is about 4367.8759139884. The cubic root of 19078340 is about 267.2064033569.

The spelling of 19078340 in words is "nineteen million, seventy-eight thousand, three hundred forty".