201866988 has 24 divisors (see below), whose sum is σ = 474188400. Its totient is φ = 66836800.

The previous prime is 201866981. The next prime is 201867007. The reversal of 201866988 is 889668102.

It is not an unprimeable number, because it can be changed into a prime (201866981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54663 + ... + 58238.

It is an arithmetic number, because the mean of its divisors is an integer number (19757850).

Almost surely, 2^201866988 is an apocalyptic number.

It is an amenable number.

201866988 is an abundant number, since it is smaller than the sum of its proper divisors (272321412).

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

201866988 is a wasteful number, since it uses less digits than its factorization.

201866988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113057 (or 113055 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 201866988 is about 14207.9902871588. The cubic root of 201866988 is about 586.6176165660.

It can be divided in two parts, 2018 and 66988, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 201866988 in words is "two hundred one million, eight hundred sixty-six thousand, nine hundred eighty-eight".