64783400 has 72 divisors (see below), whose sum is σ = 165620910. Its totient is φ = 23548800.

The previous prime is 64783399. The next prime is 64783417. The reversal of 64783400 is 438746.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 27646564 + 37136836 = 5258^2 + 6094^2 .

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 17 ways as a sum of consecutive naturals, for example, 22862 + ... + 25538.

Almost surely, 2^64783400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64783400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82810455).

64783400 is an abundant number, since it is smaller than the sum of its proper divisors (100837510).

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

64783400 is a wasteful number, since it uses less digits than its factorization.

64783400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 64783400 is about 8048.8135771678. The cubic root of 64783400 is about 401.6254690122.

The spelling of 64783400 in words is "sixty-four million, seven hundred eighty-three thousand, four hundred".