194120390 has 32 divisors (see below), whose sum is σ = 355772736. Its totient is φ = 76245120.

The previous prime is 194120383. The next prime is 194120393. The reversal of 194120390 is 93021491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194120393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264464 + ... + 265196.

It is an arithmetic number, because the mean of its divisors is an integer number (11117898).

Almost surely, 2^194120390 is an apocalyptic number.

194120390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194120390 is a deficient number, since it is larger than the sum of its proper divisors (161652346).

194120390 is a wasteful number, since it uses less digits than its factorization.

194120390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 194120390 is about 13932.7093560441. The cubic root of 194120390 is about 579.0157603719.

The spelling of 194120390 in words is "one hundred ninety-four million, one hundred twenty thousand, three hundred ninety".