19623428 has 24 divisors (see below), whose sum is σ = 39436320. Its totient is φ = 8449920.

The previous prime is 19623419. The next prime is 19623463. The reversal of 19623428 is 82432691.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10901 + ... + 12572.

It is an arithmetic number, because the mean of its divisors is an integer number (1643180).

Almost surely, 2^19623428 is an apocalyptic number.

It is an amenable number.

19623428 is an abundant number, since it is smaller than the sum of its proper divisors (19812892).

19623428 is a wasteful number, since it uses less digits than its factorization.

19623428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23507 (or 23505 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 19623428 is about 4429.8338569296. The cubic root of 19623428 is about 269.7273333293.

The spelling of 19623428 in words is "nineteen million, six hundred twenty-three thousand, four hundred twenty-eight".