201628656 has 40 divisors (see below), whose sum is σ = 578750160. Its totient is φ = 67209408.

The previous prime is 201628633. The next prime is 201628673. The reversal of 201628656 is 656826102.

201628656 is a `hidden beast` number, since 20 + 1 + 628 + 6 + 5 + 6 = 666.

It is a super-2 number, since 2×201628656² = 81308229840732672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 201628656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232935 + ... + 233798.

It is an arithmetic number, because the mean of its divisors is an integer number (14468754).

Almost surely, 2^201628656 is an apocalyptic number.

It is an amenable number.

201628656 is an abundant number, since it is smaller than the sum of its proper divisors (377121504).

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

201628656 is a wasteful number, since it uses less digits than its factorization.

201628656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466750 (or 466738 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 201628656 is about 14199.6005577622. The cubic root of 201628656 is about 586.3866644774.

The spelling of 201628656 in words is "two hundred one million, six hundred twenty-eight thousand, six hundred fifty-six".