646414076 has 72 divisors (see below), whose sum is σ = 1462887216. Its totient is φ = 247054080.

The previous prime is 646414073. The next prime is 646414091. The reversal of 646414076 is 670414646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646414073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111440 + ... + 117096.

It is an arithmetic number, because the mean of its divisors is an integer number (20317878).

Almost surely, 2^646414076 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 646414076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731443608).

646414076 is an abundant number, since it is smaller than the sum of its proper divisors (816473140).

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

646414076 is a wasteful number, since it uses less digits than its factorization.

646414076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5739 (or 5730 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 646414076 is about 25424.6745505228. The cubic root of 646414076 is about 864.6432092409.

The spelling of 646414076 in words is "six hundred forty-six million, four hundred fourteen thousand, seventy-six".