19142440 has 32 divisors (see below), whose sum is σ = 44945280. Its totient is φ = 7323712.

The previous prime is 19142437. The next prime is 19142467. The reversal of 19142440 is 4424191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9484 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (1404540).

Almost surely, 2^19142440 is an apocalyptic number.

19142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19142440 is an abundant number, since it is smaller than the sum of its proper divisors (25802840).

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

19142440 is a wasteful number, since it uses less digits than its factorization.

19142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20841 (or 20837 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 19142440 is about 4375.2074236543. The cubic root of 19142440 is about 267.5053249588.

The spelling of 19142440 in words is "nineteen million, one hundred forty-two thousand, four hundred forty".