201373640 has 48 divisors (see below), whose sum is σ = 490641300. Its totient is φ = 74350848.

The previous prime is 201373637. The next prime is 201373661. The reversal of 201373640 is 46373102.

It can be written as a sum of positive squares in 6 ways, for example, as 131044 + 201242596 = 362^2 + 14186^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 8135 + ... + 21654.

Almost surely, 2^201373640 is an apocalyptic number.

201373640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201373640 is an abundant number, since it is smaller than the sum of its proper divisors (289267660).

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

201373640 is a wasteful number, since it uses less digits than its factorization.

201373640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29826 (or 29809 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 201373640 is about 14190.6180274152. The cubic root of 201373640 is about 586.1393433654.

The spelling of 201373640 in words is "two hundred one million, three hundred seventy-three thousand, six hundred forty".