19390872 has 64 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 6145920.

The previous prime is 19390867. The next prime is 19390873. The reversal of 19390872 is 27809391.

It is a self number, because there is not a number n which added to its sum of digits gives 19390872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19390873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49654 + ... + 50042.

It is an arithmetic number, because the mean of its divisors is an integer number (795600).

Almost surely, 2^19390872 is an apocalyptic number.

19390872 is a gapful number since it is divisible by the number (12) 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 19390872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25459200).

19390872 is an abundant number, since it is smaller than the sum of its proper divisors (31527528).

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

19390872 is a wasteful number, since it uses less digits than its factorization.

19390872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 19390872 is about 4403.5067843708. The cubic root of 19390872 is about 268.6575891400.

The spelling of 19390872 in words is "nineteen million, three hundred ninety thousand, eight hundred seventy-two".