201447990 has 24 divisors (see below), whose sum is σ = 523765008. Its totient is φ = 53719440.

The previous prime is 201447989. The next prime is 201447997. The reversal of 201447990 is 99744102.

201447990 is a `hidden beast` number, since 201 + 447 + 9 + 9 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201447997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1119066 + ... + 1119245.

It is an arithmetic number, because the mean of its divisors is an integer number (21823542).

Almost surely, 2^201447990 is an apocalyptic number.

201447990 is an abundant number, since it is smaller than the sum of its proper divisors (322317018).

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

201447990 is a wasteful number, since it uses less digits than its factorization.

201447990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238324 (or 2238321 counting only the distinct ones).

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

The square root of 201447990 is about 14193.2374742340. The cubic root of 201447990 is about 586.2114714717.

The spelling of 201447990 in words is "two hundred one million, four hundred forty-seven thousand, nine hundred ninety".