194490720 has 240 divisors, whose sum is σ = 704365200. Its totient is φ = 50512896.

The previous prime is 194490713. The next prime is 194490767. The reversal of 194490720 is 27094491.

194490720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×194490720² = 75653280332236800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 557106 + ... + 557454.

It is an arithmetic number, because the mean of its divisors is an integer number (2934855).

Almost surely, 2^194490720 is an apocalyptic number.

194490720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194490720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352182600).

194490720 is an abundant number, since it is smaller than the sum of its proper divisors (509874480).

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

194490720 is a wasteful number, since it uses less digits than its factorization.

194490720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 194490720 is about 13945.9929728937. The cubic root of 194490720 is about 579.3837290921.

The spelling of 194490720 in words is "one hundred ninety-four million, four hundred ninety thousand, seven hundred twenty".