64140284 has 24 divisors (see below), whose sum is σ = 126137760. Its totient is φ = 28315584.

The previous prime is 64140233. The next prime is 64140301. The reversal of 64140284 is 48204146.

It is a super-2 number, since 2×64140284² = 8227952063201312, which contains 22 as substring.

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, 25619 + ... + 28010.

It is an arithmetic number, because the mean of its divisors is an integer number (5255740).

Almost surely, 2^64140284 is an apocalyptic number.

It is an amenable number.

64140284 is a deficient number, since it is larger than the sum of its proper divisors (61997476).

64140284 is a wasteful number, since it uses less digits than its factorization.

64140284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53669 (or 53667 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 64140284 is about 8008.7629506685. The cubic root of 64140284 is about 400.2920450557.

The spelling of 64140284 in words is "sixty-four million, one hundred forty thousand, two hundred eighty-four".