19394928 has 120 divisors (see below), whose sum is σ = 63138816. Its totient is φ = 5443200.

The previous prime is 19394917. The next prime is 19394971. The reversal of 19394928 is 82949391.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71433 + ... + 71703.

Almost surely, 2^19394928 is an apocalyptic number.

19394928 is a gapful number since it is divisible by the number (18) 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 19394928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31569408).

19394928 is an abundant number, since it is smaller than the sum of its proper divisors (43743888).

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

19394928 is a wasteful number, since it uses less digits than its factorization.

19394928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 354 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19394928 is about 4403.9673023309. The cubic root of 19394928 is about 268.6763195889.

The spelling of 19394928 in words is "nineteen million, three hundred ninety-four thousand, nine hundred twenty-eight".