19394064 has 30 divisors (see below), whose sum is σ = 54276846. Its totient is φ = 6464640.

The previous prime is 19394051. The next prime is 19394099. The reversal of 19394064 is 46049391.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 9659664 = 3120^2 + 3108^2 .

It is a super-2 number, since 2×19394064² = 752259436872192, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67197 + ... + 67484.

Almost surely, 2^19394064 is an apocalyptic number.

It is an amenable number.

19394064 is an abundant number, since it is smaller than the sum of its proper divisors (34882782).

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

19394064 is a wasteful number, since it uses less digits than its factorization.

19394064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134695 (or 134686 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 19394064 is about 4403.8692078671. The cubic root of 19394064 is about 268.6723298897.

The spelling of 19394064 in words is "nineteen million, three hundred ninety-four thousand, sixty-four".