19678472 has 48 divisors (see below), whose sum is σ = 42014700. Its totient is φ = 8624000.

The previous prime is 19678457. The next prime is 19678489. The reversal of 19678472 is 27487691.

It can be written as a sum of positive squares in 2 ways, for example, as 18783556 + 894916 = 4334^2 + 946^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27722 + ... + 28422.

Almost surely, 2^19678472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19678472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21007350).

19678472 is an abundant number, since it is smaller than the sum of its proper divisors (22336228).

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

19678472 is a wasteful number, since it uses less digits than its factorization.

19678472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 743 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 19678472 is about 4436.0423803205. The cubic root of 19678472 is about 269.9792942512.

The spelling of 19678472 in words is "nineteen million, six hundred seventy-eight thousand, four hundred seventy-two".