64263780 has 144 divisors (see below), whose sum is σ = 231154560. Its totient is φ = 14681088.

The previous prime is 64263743. The next prime is 64263811. The reversal of 64263780 is 8736246.

64263780 is a `hidden beast` number, since 642 + 6 + 3 + 7 + 8 + 0 = 666.

64263780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 33076 + ... + 34964.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240).

Almost surely, 2^64263780 is an apocalyptic number.

64263780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64263780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115577280).

64263780 is an abundant number, since it is smaller than the sum of its proper divisors (166890780).

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

64263780 is a wasteful number, since it uses less digits than its factorization.

64263780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920 (or 1906 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 64263780 is about 8016.4692976397. The cubic root of 64263780 is about 400.5487884006.

64263780 divided by its sum of digits (36) gives a triangular number (1785105 = T₁₈₈₉).

The spelling of 64263780 in words is "sixty-four million, two hundred sixty-three thousand, seven hundred eighty".