194120388 has 240 divisors, whose sum is σ = 655699968. Its totient is φ = 48600000.

The previous prime is 194120383. The next prime is 194120393. The reversal of 194120388 is 883021491.

It is an interprime number because it is at equal distance from previous prime (194120383) and next prime (194120393).

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

It is not an unprimeable number, because it can be changed into a prime (194120383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 773263 + ... + 773513.

Almost surely, 2^194120388 is an apocalyptic number.

194120388 is a gapful number since it is divisible by the number (18) 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 194120388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327849984).

194120388 is an abundant number, since it is smaller than the sum of its proper divisors (461579580).

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

194120388 is a wasteful number, since it uses less digits than its factorization.

194120388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 194120388 is about 13932.7092842706. The cubic root of 194120388 is about 579.0157583834.

The spelling of 194120388 in words is "one hundred ninety-four million, one hundred twenty thousand, three hundred eighty-eight".