19428456 has 32 divisors (see below), whose sum is σ = 48787200. Its totient is φ = 6447360.

The previous prime is 19428449. The next prime is 19428457. The reversal of 19428456 is 65482491.

It is not an unprimeable number, because it can be changed into a prime (19428457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (1524600).

Almost surely, 2^19428456 is an apocalyptic number.

It is an amenable number.

19428456 is an abundant number, since it is smaller than the sum of its proper divisors (29358744).

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

19428456 is a wasteful number, since it uses less digits than its factorization.

19428456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609 (or 3605 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 19428456 is about 4407.7722264201. The cubic root of 19428456 is about 268.8310506576.

The spelling of 19428456 in words is "nineteen million, four hundred twenty-eight thousand, four hundred fifty-six".