193990464 has 140 divisors (see below), whose sum is σ = 600419424. Its totient is φ = 61814016.

The previous prime is 193990453. The next prime is 193990469. The reversal of 193990464 is 464099391.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193990469) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118419 + ... + 120045.

Almost surely, 2^193990464 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 193990464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300209712).

193990464 is an abundant number, since it is smaller than the sum of its proper divisors (406428960).

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

193990464 is a wasteful number, since it uses less digits than its factorization.

193990464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 193990464 is about 13928.0459505273. The cubic root of 193990464 is about 578.8865519089.

The spelling of 193990464 in words is "one hundred ninety-three million, nine hundred ninety thousand, four hundred sixty-four".