201454640 has 40 divisors (see below), whose sum is σ = 481048080. Its totient is φ = 78402816.

The previous prime is 201454637. The next prime is 201454651. The reversal of 201454640 is 46454102.

It is a tau number, because it is divible by the number of its divisors (40).

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, 31070 + ... + 36989.

It is an arithmetic number, because the mean of its divisors is an integer number (12026202).

Almost surely, 2^201454640 is an apocalyptic number.

201454640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201454640 is an abundant number, since it is smaller than the sum of its proper divisors (279593440).

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

201454640 is a wasteful number, since it uses less digits than its factorization.

201454640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68109 (or 68103 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 201454640 is about 14193.4717387960. The cubic root of 201454640 is about 586.2179218767.

The spelling of 201454640 in words is "two hundred one million, four hundred fifty-four thousand, six hundred forty".