64267780 has 24 divisors (see below), whose sum is σ = 136866240. Its totient is φ = 25344480.

The previous prime is 64267771. The next prime is 64267811. The reversal of 64267780 is 8776246.

It is a super-2 number, since 2×64267780² = 8260695092256800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 21210 + ... + 24049.

It is an arithmetic number, because the mean of its divisors is an integer number (5702760).

Almost surely, 2^64267780 is an apocalyptic number.

It is an amenable number.

64267780 is an abundant number, since it is smaller than the sum of its proper divisors (72598460).

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

64267780 is a wasteful number, since it uses less digits than its factorization.

64267780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45339 (or 45337 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 64267780 is about 8016.7187801494. The cubic root of 64267780 is about 400.5570987423.

The spelling of 64267780 in words is "sixty-four million, two hundred sixty-seven thousand, seven hundred eighty".