19490407 has 8 divisors (see below), whose sum is σ = 21039840. Its totient is φ = 17999520.

The previous prime is 19490357. The next prime is 19490411. The reversal of 19490407 is 70409491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19490407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490417) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13944 + ... + 15277.

It is an arithmetic number, because the mean of its divisors is an integer number (2629980).

Almost surely, 2^19490407 is an apocalyptic number.

19490407 is a deficient number, since it is larger than the sum of its proper divisors (1549433).

19490407 is a wasteful number, since it uses less digits than its factorization.

19490407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29273.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 19490407 is about 4414.7941061843. The cubic root of 19490407 is about 269.1164856222.

Adding to 19490407 its reverse (70409491), we get a palindrome (89899898).

It can be divided in two parts, 194 and 90407, that added together give a square (90601 = 301²).

The spelling of 19490407 in words is "nineteen million, four hundred ninety thousand, four hundred seven".