194721648 has 40 divisors (see below), whose sum is σ = 548762496. Its totient is φ = 59006400.

The previous prime is 194721617. The next prime is 194721661. The reversal of 194721648 is 846127491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183868 + ... + 184923.

Almost surely, 2^194721648 is an apocalyptic number.

It is an amenable number.

194721648 is an abundant number, since it is smaller than the sum of its proper divisors (354040848).

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

194721648 is a wasteful number, since it uses less digits than its factorization.

194721648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368813 (or 368807 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 194721648 is about 13954.2698841609. The cubic root of 194721648 is about 579.6129482662.

The spelling of 194721648 in words is "one hundred ninety-four million, seven hundred twenty-one thousand, six hundred forty-eight".