19040940 has 96 divisors (see below), whose sum is σ = 60903360. Its totient is φ = 4935168.

The previous prime is 19040929. The next prime is 19040951. The reversal of 19040940 is 4904091.

It is an interprime number because it is at equal distance from previous prime (19040929) and next prime (19040951).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19504 + ... + 20456.

It is an arithmetic number, because the mean of its divisors is an integer number (634410).

Almost surely, 2^19040940 is an apocalyptic number.

19040940 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 19040940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30451680).

19040940 is an abundant number, since it is smaller than the sum of its proper divisors (41862420).

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

19040940 is a wasteful number, since it uses less digits than its factorization.

19040940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19040940 is about 4363.5925565983. The cubic root of 19040940 is about 267.0316841582.

The spelling of 19040940 in words is "nineteen million, forty thousand, nine hundred forty".