194977020 has 96 divisors (see below), whose sum is σ = 629798400. Its totient is φ = 44146944.

The previous prime is 194977019. The next prime is 194977033. The reversal of 194977020 is 20779491.

It is a self number, because there is not a number n which added to its sum of digits gives 194977020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43651 + ... + 47909.

It is an arithmetic number, because the mean of its divisors is an integer number (6560400).

Almost surely, 2^194977020 is an apocalyptic number.

194977020 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 194977020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314899200).

194977020 is an abundant number, since it is smaller than the sum of its proper divisors (434821380).

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

194977020 is a wasteful number, since it uses less digits than its factorization.

194977020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4387 (or 4385 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 194977020 is about 13963.4172035358. The cubic root of 194977020 is about 579.8662196406.

The spelling of 194977020 in words is "one hundred ninety-four million, nine hundred seventy-seven thousand, twenty".