19642248 has 24 divisors (see below), whose sum is σ = 53197950. Its totient is φ = 6547392.

The previous prime is 19642241. The next prime is 19642267. The reversal of 19642248 is 84224691.

19642248 is a `hidden beast` number, since 1 + 9 + 642 + 2 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18301284 + 1340964 = 4278^2 + 1158^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (19642241) 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 5 ways as a sum of consecutive naturals, for example, 136333 + ... + 136476.

Almost surely, 2^19642248 is an apocalyptic number.

19642248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19642248 is an abundant number, since it is smaller than the sum of its proper divisors (33555702).

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

19642248 is a wasteful number, since it uses less digits than its factorization.

19642248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272821 (or 272814 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 19642248 is about 4431.9575810244. The cubic root of 19642248 is about 269.8135338046.

The spelling of 19642248 in words is "nineteen million, six hundred forty-two thousand, two hundred forty-eight".