19390064 has 20 divisors (see below), whose sum is σ = 39778704. Its totient is φ = 9124608.

The previous prime is 19390043. The next prime is 19390079. The reversal of 19390064 is 46009391.

It is a self number, because there is not a number n which added to its sum of digits gives 19390064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35372 + ... + 35915.

Almost surely, 2^19390064 is an apocalyptic number.

It is an amenable number.

19390064 is an abundant number, since it is smaller than the sum of its proper divisors (20388640).

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

19390064 is a wasteful number, since it uses less digits than its factorization.

19390064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71312 (or 71306 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 19390064 is about 4403.4150383538. The cubic root of 19390064 is about 268.6538575157.

The spelling of 19390064 in words is "nineteen million, three hundred ninety thousand, sixty-four".