194420780 has 12 divisors (see below), whose sum is σ = 408283680. Its totient is φ = 77768304.

The previous prime is 194420701. The next prime is 194420803. The reversal of 194420780 is 87024491.

It is a self number, because there is not a number n which added to its sum of digits gives 194420780.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4860500 + ... + 4860539.

It is an arithmetic number, because the mean of its divisors is an integer number (34023640).

Almost surely, 2^194420780 is an apocalyptic number.

194420780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194420780 is an abundant number, since it is smaller than the sum of its proper divisors (213862900).

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

194420780 is a wasteful number, since it uses less digits than its factorization.

194420780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9721048 (or 9721046 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 194420780 is about 13943.4852171184. The cubic root of 194420780 is about 579.3142708401.

The spelling of 194420780 in words is "one hundred ninety-four million, four hundred twenty thousand, seven hundred eighty".