64271940 has 48 divisors (see below), whose sum is σ = 180690048. Its totient is φ = 17069824.

The previous prime is 64271903. The next prime is 64271941. The reversal of 64271940 is 4917246.

It is a happy number.

64271940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64271941) 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 15 ways as a sum of consecutive naturals, for example, 13744 + ... + 17816.

It is an arithmetic number, because the mean of its divisors is an integer number (3764376).

Almost surely, 2^64271940 is an apocalyptic number.

64271940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64271940 is an abundant number, since it is smaller than the sum of its proper divisors (116418108).

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

64271940 is a wasteful number, since it uses less digits than its factorization.

64271940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348 (or 4346 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 64271940 is about 8016.9782337237. The cubic root of 64271940 is about 400.5657411319.

The spelling of 64271940 in words is "sixty-four million, two hundred seventy-one thousand, nine hundred forty".