201634040 has 16 divisors (see below), whose sum is σ = 453676680. Its totient is φ = 80653600.

The previous prime is 201634033. The next prime is 201634049. The reversal of 201634040 is 40436102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201634049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520386 + ... + 2520465.

Almost surely, 2^201634040 is an apocalyptic number.

201634040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201634040 is an abundant number, since it is smaller than the sum of its proper divisors (252042640).

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

201634040 is a wasteful number, since it uses less digits than its factorization.

201634040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040862 (or 5040858 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 201634040 is about 14199.7901392943. The cubic root of 201634040 is about 586.3918837714.

The spelling of 201634040 in words is "two hundred one million, six hundred thirty-four thousand, forty".