19649748 has 12 divisors (see below), whose sum is σ = 45849440. Its totient is φ = 6549912.

The previous prime is 19649741. The next prime is 19649759. The reversal of 19649748 is 84794691.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×19649748² = 772225192927008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19649697 and 19649706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19649741) 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 3 ways as a sum of consecutive naturals, for example, 818728 + ... + 818751.

Almost surely, 2^19649748 is an apocalyptic number.

It is an amenable number.

19649748 is an abundant number, since it is smaller than the sum of its proper divisors (26199692).

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

19649748 is a wasteful number, since it uses less digits than its factorization.

19649748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637486 (or 1637484 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 19649748 is about 4432.8036275026. The cubic root of 19649748 is about 269.8478704040.

The spelling of 19649748 in words is "nineteen million, six hundred forty-nine thousand, seven hundred forty-eight".