64273340 has 24 divisors (see below), whose sum is σ = 135263520. Its totient is φ = 25654208.

The previous prime is 64273337. The next prime is 64273399. The reversal of 64273340 is 4337246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6866 + ... + 13254.

It is an arithmetic number, because the mean of its divisors is an integer number (5635980).

Almost surely, 2^64273340 is an apocalyptic number.

It is an amenable number.

64273340 is an abundant number, since it is smaller than the sum of its proper divisors (70990180).

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

64273340 is a wasteful number, since it uses less digits than its factorization.

64273340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6901 (or 6899 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 64273340 is about 8017.0655479421. The cubic root of 64273340 is about 400.5686495445.

The spelling of 64273340 in words is "sixty-four million, two hundred seventy-three thousand, three hundred forty".