201628890 has 24 divisors (see below), whose sum is σ = 524235348. Its totient is φ = 53767680.

The previous prime is 201628871. The next prime is 201628913. The reversal of 201628890 is 98826102.

201628890 is a `hidden beast` number, since 20 + 1 + 628 + 8 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 174160809 + 27468081 = 13197^2 + 5241^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1120071 + ... + 1120250.

Almost surely, 2^201628890 is an apocalyptic number.

201628890 is an abundant number, since it is smaller than the sum of its proper divisors (322606458).

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

201628890 is a wasteful number, since it uses less digits than its factorization.

201628890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240334 (or 2240331 counting only the distinct ones).

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

The square root of 201628890 is about 14199.6087974282. The cubic root of 201628890 is about 586.3868913209.

The spelling of 201628890 in words is "two hundred one million, six hundred twenty-eight thousand, eight hundred ninety".