19678064 has 40 divisors (see below), whose sum is σ = 45473280. Its totient is φ = 8065728.

The previous prime is 19678039. The next prime is 19678067. The reversal of 19678064 is 46087691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19678067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1244 + ... + 6395.

It is an arithmetic number, because the mean of its divisors is an integer number (1136832).

Almost surely, 2^19678064 is an apocalyptic number.

19678064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19678064 is an abundant number, since it is smaller than the sum of its proper divisors (25795216).

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

19678064 is a wasteful number, since it uses less digits than its factorization.

19678064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7677 (or 7671 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 19678064 is about 4435.9963931455. The cubic root of 19678064 is about 269.9774283829.

The spelling of 19678064 in words is "nineteen million, six hundred seventy-eight thousand, sixty-four".