19428858 has 24 divisors (see below), whose sum is σ = 44572788. Its totient is φ = 6095232.

The previous prime is 19428853. The next prime is 19428863. The reversal of 19428858 is 85882491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19428853) and next prime (19428863).

It can be written as a sum of positive squares in 2 ways, for example, as 18948609 + 480249 = 4353^2 + 693^2 .

It is not an unprimeable number, because it can be changed into a prime (19428853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31441 + ... + 32052.

Almost surely, 2^19428858 is an apocalyptic number.

19428858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19428858 is an abundant number, since it is smaller than the sum of its proper divisors (25143930).

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

19428858 is a wasteful number, since it uses less digits than its factorization.

19428858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63518 (or 63515 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 19428858 is about 4407.8178274516. The cubic root of 19428858 is about 268.8329047994.

The spelling of 19428858 in words is "nineteen million, four hundred twenty-eight thousand, eight hundred fifty-eight".