19428417 has 10 divisors (see below), whose sum is σ = 29022818. Its totient is φ = 12952224.

The previous prime is 19428407. The next prime is 19428427. The reversal of 19428417 is 71482491.

It is an interprime number because it is at equal distance from previous prime (19428407) and next prime (19428427).

It can be written as a sum of positive squares in only one way, i.e., 12895281 + 6533136 = 3591^2 + 2556^2 .

It is not a de Polignac number, because 19428417 - 2⁴ = 19428401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19428407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 119848 + ... + 120009.

Almost surely, 2^19428417 is an apocalyptic number.

It is an amenable number.

19428417 is a deficient number, since it is larger than the sum of its proper divisors (9594401).

19428417 is an equidigital number, since it uses as much as digits as its factorization.

19428417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239869 (or 239860 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 19428417 is about 4407.7678024143. The cubic root of 19428417 is about 268.8308707768.

The spelling of 19428417 in words is "nineteen million, four hundred twenty-eight thousand, four hundred seventeen".